SlideShare a Scribd company logo
1 of 16
Download to read offline
BIOCHEMICAL PROPERTIES OF WATER
PRESENTED BY:
Mr. Raveesha D
1st Msc(1st semester)
Sahyadri science college Shivamogga
UNDER THE GUIDANCE OF
Dr. Pradeepa k
Assistant Professor
PG dept of biotechnology
Sahyadri science college Shivamogga
CONTENTS
 INTRODUCTION
 STRUCTURE
 BIOCHEMICAL PROPERTIES OF WATER
 POLARITY OF WATER
 AMPHIPROTIC NATURE OF WATER
 ANOMALOUS BEHAVIOUR OF WATER
 IONIZATION OF WATER
 PH
 BUFFER
 CONCLUSION
INTRODUCTION
Water is composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid,
and solid states.
The strucutre of the water molecule gives water its unique properties.
These properties include its high polarity, solvent, cohesive, adhesive properties, high specific heat
capacity, and its ability to ionize.
These charateristics make water a universal solvent, facilitating biochemical reactions, maintaining
cellular structures, and regulating temperature in living organisms.
Each molecule of water consists of one atom of oxygen and two atoms of hydrogen, so it has the
chemical formula H₂O.
STRUCTURE OF WATER
MOLECULE
Water consists of one atom of oxygen and two atoms of
hydrogen which are held together by covalent bond,
which is formed by sharing of 2 electrons. These bonds
are formed because of higher electronegativity of
oxygen atom.
The oxygen atom attracts the shared pair of electrons of
the covalent bonds towards itself than hydrogen atom.
Has a result it has a region with a slight negative charge
(the oxygen atom) and a region with a slight positive
charge (the hydrogen atoms).
The bond length between hydrogen and oxygen is
95.84 pm.
It has bond angle 104.45’, with a bent shape.
BIOCHEMICAL PROPERTIES OF WATER
 Solvent property: Water is the universal solvent most of biological activities and chemical reactions
occur in aqueous (water- based) solutions. It is a polar molecule with partially positive and negative
charges, it readily dissolves small non polar covalent molecules, ionic compounds, and other polar
covalent molecules .
 Water soluble molecules are described as hydrophilic (water loving). Hydrophilic molecules dissolve
in water.
Those molecules that are not soluble in water are hydrophobic (water hating or fearing). Hydrophobic
molecules repel water.
Medium for chemical reactions- hydration/dehydration reactions.
WATER IN
REACTIONS
When the ionic compounds are added to water,
individual ions interact with the polar regions of
water molecules during dissociation.
Ex; Nacl crystals are added to water, it dissociates
into Na+ and Cl- ions and the positively-charged
sodium ion is surrounded by the partially - negative
charge of the water molecule oxygen, the
negatively-changed chloride ion is surrounded by
the partially- positive charge of the hydrogen in the
water molecule.
POLARITY OF
WATER
Water is polar molecule because oxygen and hydrogen have
different electronegativity value. Here oxygen attracts shared pair
of electrons towards itself than hydrogen atom. It forms polar
covalent bonds.
This creates a partial positive charge on hydrogen and a partial
negative charge on oxygen atom.
Water has a variety of unusual properties because of attractions
between these polar molecules.
The slightly negative regions of one molecule are attracted to the
slightly positive regions of nearby molecules, forming a hydrogen
bond which is a weak bond.
Water molecules attract each other through the special type of
dipole-dipole interaction known as hydrogen bonding.
AMPHIPROTIC NATURE OF WATER
• Due to its highly polar structure, water can either act as an acid (by donating a proton to a base) or a base
(by using a lone pair of electrons to accept a proton).
• As bases: When a strong acid like Hcl dissolves in water, it separates into chloride ions (Cl–) and protons
(H+). In turn, the proton reacts with a water molecule to form the hydronium ion (H3O+).
Hcl (aq) + H2O(l) → H3O+(aq) + Cl–(aq)
The acid in this reaction is Hcl, and the base is water, which accepts an H+ ion.
• As acids: Water can also act as an acid. H2O donates a proton to NH3, which acts as a base.
In this equilibrium reaction:H2O(aq) + NH3(aq) ⇆ (NH4) + OH-
• Water is thus called amphiprotic because it can act as an acid or a base depending on the nature of the other
reactant.
ANOMALOUS BEHAVIOUR OF WATER.
• It is a abnormal property of water where by it expands instead of contracting when
temperature goes from 4 degree Celsius to zero degree Celsius and it became less
dense.
• Example : the density of ice is lower than water, so it floats on water.
• At about 4 degree Celsius water reaches its maximum density ,behind its temperature
water will always expand whether it is being warmed up or cooled down .
• This characteristics of water plays significant role in sustaining marine life.
Cohesion-water molecules stick to each other which are held together by hydrogen bonds.
 Adhesion-water molecules stick to unlike surfaces such as glass or plastic due to hydrogen-
bonds between water and other polar compounds.
Surface tension-the property of the surface of liquid(water) that allows it to resist an external
force due to the cohesive nature of its molecules.
High specific heat- it takes a lot of energy to raise or lower the temperature of water. As a result,
water plays a very important role in temperature regulation.
High heat of vaporization- many hydrogen bonds must be broken before water can evaporate so
it needs high heat.
IONIZATION OF WATER
The water molecule ionizes to form H+ and OH
-
ions.
The reaction in which a water molecule donates
one of its protons to a neighboring water
molecule, either in pure water or in an aqueous
solution, is called the self-ionization of water.
In an self ionization process, one water molecule
can react with another to form an OH– ion
and an H3O+ ion:
PH
• PH=potential of hydrogen, (negative log of the concentration of hydrogen ions).
• water ionizes, H+ splits off from H₂O, leaving OH-
• If [H+] = [OH-], water is neutral. Ph = 7.
• If [H+] > [OH-], water is acidic. Ph<7.
• If [H+] < [OH-], water is basic. Ph>7.
• PH scale measures the acidity or basicity of aqueous or other liquid solutions.
BUFFERS
Buffers are aqueous systems that resist Changes in PH when small amounts of a strong acid or
base are added.
Types of buffer solutions
Acidic buffers:- These solutions are used to maintain acidic environments. Acidic buffer has acidic PH
and is prepared by mixing a weak acid and its salt with strong base.
The PH of this solution is below 7. Ex : Sodium acetate and Acetic acid.(PH 4.75).
Alkaline buffers:- these buffer solutions are used to maintain basic conditions it is prepared by mixing
week base and its salt with strong acid. PH of these solution is above 7.
Ex: Ammonium hydroxide and Ammonium chloride (PH 9.25).
• Control PH by buffers , reservoir of H+
Donate H+ when [H+] falls,
Absorb H+ when [H+] rises.
CONCLUSION
• Water is an excellent solvent it has Unique ability to dissolve many polar and ionic substances it
has unusual properties resulting from the water molecules polar structure that give rise to
hydrogen bond.
• The biochemical properties of water play vital roles in various biological processes, including
solvent action, temperature regulation, and participation in metabolic reactions. Its unique
properties, such as high specific heat, cohesion, and universal solvent ability, make it
indispensable for life as we know it.
• Further more, water's cohesive properties enable it to form hydrogen bonds.
REFERENCE
• Fundamentals of biochemistry, Dr. JL Jain, Dr. Sunjay Jain, Nithin Jain. S chand
publications. Page no: 2-30.
• Biochemistry, SC Rostogi, Tata MC Grew hill publications.
• http:// biolibretexts.Org/courses—biochemical propreties of water.
BIOCHEMICAL PROPERTIES OF WATER .Raveesh.pptx

More Related Content

Similar to BIOCHEMICAL PROPERTIES OF WATER .Raveesh.pptx

Sci 202_Advanced Biological Science Report - Copy.pptx
Sci 202_Advanced Biological Science Report - Copy.pptxSci 202_Advanced Biological Science Report - Copy.pptx
Sci 202_Advanced Biological Science Report - Copy.pptxGenelYutuc3
 
Physicochemical properties of water
Physicochemical properties of waterPhysicochemical properties of water
Physicochemical properties of waterPratikshaPuranik5
 
Properties of water and aqueous solutions
Properties of water and aqueous solutionsProperties of water and aqueous solutions
Properties of water and aqueous solutionssabir shah
 
CVA Biology I - B10vrv1022
CVA Biology I - B10vrv1022CVA Biology I - B10vrv1022
CVA Biology I - B10vrv1022ClayVirtual
 
DOC-20191001-WA0001.pptx
DOC-20191001-WA0001.pptxDOC-20191001-WA0001.pptx
DOC-20191001-WA0001.pptxAliHamid77
 
B.Sc. Biochem II BPI Unit 1 Water, pH and Buffer
B.Sc. Biochem II BPI Unit 1 Water, pH and BufferB.Sc. Biochem II BPI Unit 1 Water, pH and Buffer
B.Sc. Biochem II BPI Unit 1 Water, pH and BufferRai University
 
05 chemical elements_and_water
05 chemical elements_and_water05 chemical elements_and_water
05 chemical elements_and_waternaftzingerj
 
1.1 Water & pH.pptx
1.1 Water & pH.pptx1.1 Water & pH.pptx
1.1 Water & pH.pptxNeelamZaidi1
 
Explain how water interacts with the following types of compounds to.pdf
Explain how water interacts with the following types of compounds to.pdfExplain how water interacts with the following types of compounds to.pdf
Explain how water interacts with the following types of compounds to.pdfarmyshoes
 
water, buffer system in human body and pH.pptx
water, buffer system in human body and  pH.pptxwater, buffer system in human body and  pH.pptx
water, buffer system in human body and pH.pptxDrQamarYasmeen
 
Water and pH lecture Note .pptx
Water and pH lecture Note .pptxWater and pH lecture Note .pptx
Water and pH lecture Note .pptxMuhammadIbrahim431
 
Water And Buffers
Water And  BuffersWater And  Buffers
Water And Buffersmpark4
 
Unique properties of water
Unique properties of waterUnique properties of water
Unique properties of watervjcummins
 
20 ch02chemistry2010
20 ch02chemistry201020 ch02chemistry2010
20 ch02chemistry2010cinhasler
 
20 ch02chemistry2010
20 ch02chemistry201020 ch02chemistry2010
20 ch02chemistry2010cinhasler
 
Water : A Green Solvent With A Difference
Water : A Green Solvent With A DifferenceWater : A Green Solvent With A Difference
Water : A Green Solvent With A DifferenceBalmukund Thakkar
 
Properties of water
Properties of waterProperties of water
Properties of waterraoultown
 

Similar to BIOCHEMICAL PROPERTIES OF WATER .Raveesh.pptx (20)

Sci 202_Advanced Biological Science Report - Copy.pptx
Sci 202_Advanced Biological Science Report - Copy.pptxSci 202_Advanced Biological Science Report - Copy.pptx
Sci 202_Advanced Biological Science Report - Copy.pptx
 
Physicochemical properties of water
Physicochemical properties of waterPhysicochemical properties of water
Physicochemical properties of water
 
Properties of water and aqueous solutions
Properties of water and aqueous solutionsProperties of water and aqueous solutions
Properties of water and aqueous solutions
 
CVA Biology I - B10vrv1022
CVA Biology I - B10vrv1022CVA Biology I - B10vrv1022
CVA Biology I - B10vrv1022
 
DOC-20191001-WA0001.pptx
DOC-20191001-WA0001.pptxDOC-20191001-WA0001.pptx
DOC-20191001-WA0001.pptx
 
B.Sc. Biochem II BPI Unit 1 Water, pH and Buffer
B.Sc. Biochem II BPI Unit 1 Water, pH and BufferB.Sc. Biochem II BPI Unit 1 Water, pH and Buffer
B.Sc. Biochem II BPI Unit 1 Water, pH and Buffer
 
05 chemical elements_and_water
05 chemical elements_and_water05 chemical elements_and_water
05 chemical elements_and_water
 
1.1 Water & pH.pptx
1.1 Water & pH.pptx1.1 Water & pH.pptx
1.1 Water & pH.pptx
 
Explain how water interacts with the following types of compounds to.pdf
Explain how water interacts with the following types of compounds to.pdfExplain how water interacts with the following types of compounds to.pdf
Explain how water interacts with the following types of compounds to.pdf
 
Chemistry of life
Chemistry of lifeChemistry of life
Chemistry of life
 
water, buffer system in human body and pH.pptx
water, buffer system in human body and  pH.pptxwater, buffer system in human body and  pH.pptx
water, buffer system in human body and pH.pptx
 
1.1 Water & pH.pptx
1.1 Water & pH.pptx1.1 Water & pH.pptx
1.1 Water & pH.pptx
 
Water and pH lecture Note .pptx
Water and pH lecture Note .pptxWater and pH lecture Note .pptx
Water and pH lecture Note .pptx
 
waters_properties_ppt.ppt
waters_properties_ppt.pptwaters_properties_ppt.ppt
waters_properties_ppt.ppt
 
Water And Buffers
Water And  BuffersWater And  Buffers
Water And Buffers
 
Unique properties of water
Unique properties of waterUnique properties of water
Unique properties of water
 
20 ch02chemistry2010
20 ch02chemistry201020 ch02chemistry2010
20 ch02chemistry2010
 
20 ch02chemistry2010
20 ch02chemistry201020 ch02chemistry2010
20 ch02chemistry2010
 
Water : A Green Solvent With A Difference
Water : A Green Solvent With A DifferenceWater : A Green Solvent With A Difference
Water : A Green Solvent With A Difference
 
Properties of water
Properties of waterProperties of water
Properties of water
 

Recently uploaded

Paul Dobryden In Media Res Media Component
Paul Dobryden In Media Res Media ComponentPaul Dobryden In Media Res Media Component
Paul Dobryden In Media Res Media ComponentInMediaRes1
 
DORA, ISO/IEC 27005, and the Rise of AI: Securing the Future of Cybersecurity
DORA, ISO/IEC 27005, and the Rise of AI: Securing the Future of CybersecurityDORA, ISO/IEC 27005, and the Rise of AI: Securing the Future of Cybersecurity
DORA, ISO/IEC 27005, and the Rise of AI: Securing the Future of CybersecurityPECB
 
BÀI TẬP BỔ TRỢ 4 KĨ NĂNG TIẾNG ANH LỚP 8 - CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC ...
BÀI TẬP BỔ TRỢ 4 KĨ NĂNG TIẾNG ANH LỚP 8 - CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC ...BÀI TẬP BỔ TRỢ 4 KĨ NĂNG TIẾNG ANH LỚP 8 - CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC ...
BÀI TẬP BỔ TRỢ 4 KĨ NĂNG TIẾNG ANH LỚP 8 - CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC ...Nguyen Thanh Tu Collection
 
CLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptxCLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptxAnupam32727
 
Sarah Lahm In Media Res Media Component
Sarah Lahm  In Media Res Media ComponentSarah Lahm  In Media Res Media Component
Sarah Lahm In Media Res Media ComponentInMediaRes1
 
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...Nguyen Thanh Tu Collection
 
4.4.24 Economic Precarity and Global Economic Forces.pptx
4.4.24 Economic Precarity and Global Economic Forces.pptx4.4.24 Economic Precarity and Global Economic Forces.pptx
4.4.24 Economic Precarity and Global Economic Forces.pptxmary850239
 
(Part 3) CHILDREN'S DISABILITIES AND EXCEPTIONALITIES.pdf
(Part 3) CHILDREN'S DISABILITIES AND EXCEPTIONALITIES.pdf(Part 3) CHILDREN'S DISABILITIES AND EXCEPTIONALITIES.pdf
(Part 3) CHILDREN'S DISABILITIES AND EXCEPTIONALITIES.pdfMJDuyan
 
Geoffrey Chaucer Works II UGC NET JRF TGT PGT MA PHD Entrance Exam II History...
Geoffrey Chaucer Works II UGC NET JRF TGT PGT MA PHD Entrance Exam II History...Geoffrey Chaucer Works II UGC NET JRF TGT PGT MA PHD Entrance Exam II History...
Geoffrey Chaucer Works II UGC NET JRF TGT PGT MA PHD Entrance Exam II History...DrVipulVKapoor
 
Healthy Minds, Flourishing Lives: A Philosophical Approach to Mental Health a...
Healthy Minds, Flourishing Lives: A Philosophical Approach to Mental Health a...Healthy Minds, Flourishing Lives: A Philosophical Approach to Mental Health a...
Healthy Minds, Flourishing Lives: A Philosophical Approach to Mental Health a...Osopher
 
Objectives n learning outcoms - MD 20240404.pptx
Objectives n learning outcoms - MD 20240404.pptxObjectives n learning outcoms - MD 20240404.pptx
Objectives n learning outcoms - MD 20240404.pptxMadhavi Dharankar
 
Shark introduction Morphology and its behaviour characteristics
Shark introduction Morphology and its behaviour characteristicsShark introduction Morphology and its behaviour characteristics
Shark introduction Morphology and its behaviour characteristicsArubSultan
 
The role of Geography in climate education: science and active citizenship
The role of Geography in climate education: science and active citizenshipThe role of Geography in climate education: science and active citizenship
The role of Geography in climate education: science and active citizenshipKarl Donert
 
Sulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their usesSulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their usesVijayaLaxmi84
 
LEVERAGING SYNERGISM INDUSTRY-ACADEMIA PARTNERSHIP FOR IMPLEMENTATION OF NAT...
LEVERAGING SYNERGISM INDUSTRY-ACADEMIA PARTNERSHIP FOR IMPLEMENTATION OF  NAT...LEVERAGING SYNERGISM INDUSTRY-ACADEMIA PARTNERSHIP FOR IMPLEMENTATION OF  NAT...
LEVERAGING SYNERGISM INDUSTRY-ACADEMIA PARTNERSHIP FOR IMPLEMENTATION OF NAT...pragatimahajan3
 
The Emergence of Legislative Behavior in the Colombian Congress
The Emergence of Legislative Behavior in the Colombian CongressThe Emergence of Legislative Behavior in the Colombian Congress
The Emergence of Legislative Behavior in the Colombian CongressMaria Paula Aroca
 
4.9.24 Social Capital and Social Exclusion.pptx
4.9.24 Social Capital and Social Exclusion.pptx4.9.24 Social Capital and Social Exclusion.pptx
4.9.24 Social Capital and Social Exclusion.pptxmary850239
 
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 - I-LEARN SMART WORLD - CẢ NĂM - CÓ FILE NGHE (BẢN...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 - I-LEARN SMART WORLD - CẢ NĂM - CÓ FILE NGHE (BẢN...BÀI TẬP BỔ TRỢ TIẾNG ANH 8 - I-LEARN SMART WORLD - CẢ NĂM - CÓ FILE NGHE (BẢN...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 - I-LEARN SMART WORLD - CẢ NĂM - CÓ FILE NGHE (BẢN...Nguyen Thanh Tu Collection
 
How to Share Dashboard in the Odoo 17 ERP
How to Share Dashboard in the Odoo 17 ERPHow to Share Dashboard in the Odoo 17 ERP
How to Share Dashboard in the Odoo 17 ERPCeline George
 

Recently uploaded (20)

Paul Dobryden In Media Res Media Component
Paul Dobryden In Media Res Media ComponentPaul Dobryden In Media Res Media Component
Paul Dobryden In Media Res Media Component
 
DORA, ISO/IEC 27005, and the Rise of AI: Securing the Future of Cybersecurity
DORA, ISO/IEC 27005, and the Rise of AI: Securing the Future of CybersecurityDORA, ISO/IEC 27005, and the Rise of AI: Securing the Future of Cybersecurity
DORA, ISO/IEC 27005, and the Rise of AI: Securing the Future of Cybersecurity
 
BÀI TẬP BỔ TRỢ 4 KĨ NĂNG TIẾNG ANH LỚP 8 - CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC ...
BÀI TẬP BỔ TRỢ 4 KĨ NĂNG TIẾNG ANH LỚP 8 - CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC ...BÀI TẬP BỔ TRỢ 4 KĨ NĂNG TIẾNG ANH LỚP 8 - CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC ...
BÀI TẬP BỔ TRỢ 4 KĨ NĂNG TIẾNG ANH LỚP 8 - CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC ...
 
CLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptxCLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptx
 
Sarah Lahm In Media Res Media Component
Sarah Lahm  In Media Res Media ComponentSarah Lahm  In Media Res Media Component
Sarah Lahm In Media Res Media Component
 
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
 
4.4.24 Economic Precarity and Global Economic Forces.pptx
4.4.24 Economic Precarity and Global Economic Forces.pptx4.4.24 Economic Precarity and Global Economic Forces.pptx
4.4.24 Economic Precarity and Global Economic Forces.pptx
 
(Part 3) CHILDREN'S DISABILITIES AND EXCEPTIONALITIES.pdf
(Part 3) CHILDREN'S DISABILITIES AND EXCEPTIONALITIES.pdf(Part 3) CHILDREN'S DISABILITIES AND EXCEPTIONALITIES.pdf
(Part 3) CHILDREN'S DISABILITIES AND EXCEPTIONALITIES.pdf
 
Geoffrey Chaucer Works II UGC NET JRF TGT PGT MA PHD Entrance Exam II History...
Geoffrey Chaucer Works II UGC NET JRF TGT PGT MA PHD Entrance Exam II History...Geoffrey Chaucer Works II UGC NET JRF TGT PGT MA PHD Entrance Exam II History...
Geoffrey Chaucer Works II UGC NET JRF TGT PGT MA PHD Entrance Exam II History...
 
Healthy Minds, Flourishing Lives: A Philosophical Approach to Mental Health a...
Healthy Minds, Flourishing Lives: A Philosophical Approach to Mental Health a...Healthy Minds, Flourishing Lives: A Philosophical Approach to Mental Health a...
Healthy Minds, Flourishing Lives: A Philosophical Approach to Mental Health a...
 
Objectives n learning outcoms - MD 20240404.pptx
Objectives n learning outcoms - MD 20240404.pptxObjectives n learning outcoms - MD 20240404.pptx
Objectives n learning outcoms - MD 20240404.pptx
 
Shark introduction Morphology and its behaviour characteristics
Shark introduction Morphology and its behaviour characteristicsShark introduction Morphology and its behaviour characteristics
Shark introduction Morphology and its behaviour characteristics
 
The role of Geography in climate education: science and active citizenship
The role of Geography in climate education: science and active citizenshipThe role of Geography in climate education: science and active citizenship
The role of Geography in climate education: science and active citizenship
 
Sulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their usesSulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their uses
 
LEVERAGING SYNERGISM INDUSTRY-ACADEMIA PARTNERSHIP FOR IMPLEMENTATION OF NAT...
LEVERAGING SYNERGISM INDUSTRY-ACADEMIA PARTNERSHIP FOR IMPLEMENTATION OF  NAT...LEVERAGING SYNERGISM INDUSTRY-ACADEMIA PARTNERSHIP FOR IMPLEMENTATION OF  NAT...
LEVERAGING SYNERGISM INDUSTRY-ACADEMIA PARTNERSHIP FOR IMPLEMENTATION OF NAT...
 
The Emergence of Legislative Behavior in the Colombian Congress
The Emergence of Legislative Behavior in the Colombian CongressThe Emergence of Legislative Behavior in the Colombian Congress
The Emergence of Legislative Behavior in the Colombian Congress
 
4.9.24 Social Capital and Social Exclusion.pptx
4.9.24 Social Capital and Social Exclusion.pptx4.9.24 Social Capital and Social Exclusion.pptx
4.9.24 Social Capital and Social Exclusion.pptx
 
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 - I-LEARN SMART WORLD - CẢ NĂM - CÓ FILE NGHE (BẢN...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 - I-LEARN SMART WORLD - CẢ NĂM - CÓ FILE NGHE (BẢN...BÀI TẬP BỔ TRỢ TIẾNG ANH 8 - I-LEARN SMART WORLD - CẢ NĂM - CÓ FILE NGHE (BẢN...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 - I-LEARN SMART WORLD - CẢ NĂM - CÓ FILE NGHE (BẢN...
 
Mattingly "AI & Prompt Design" - Introduction to Machine Learning"
Mattingly "AI & Prompt Design" - Introduction to Machine Learning"Mattingly "AI & Prompt Design" - Introduction to Machine Learning"
Mattingly "AI & Prompt Design" - Introduction to Machine Learning"
 
How to Share Dashboard in the Odoo 17 ERP
How to Share Dashboard in the Odoo 17 ERPHow to Share Dashboard in the Odoo 17 ERP
How to Share Dashboard in the Odoo 17 ERP
 

BIOCHEMICAL PROPERTIES OF WATER .Raveesh.pptx

  • 1. BIOCHEMICAL PROPERTIES OF WATER PRESENTED BY: Mr. Raveesha D 1st Msc(1st semester) Sahyadri science college Shivamogga UNDER THE GUIDANCE OF Dr. Pradeepa k Assistant Professor PG dept of biotechnology Sahyadri science college Shivamogga
  • 2. CONTENTS  INTRODUCTION  STRUCTURE  BIOCHEMICAL PROPERTIES OF WATER  POLARITY OF WATER  AMPHIPROTIC NATURE OF WATER  ANOMALOUS BEHAVIOUR OF WATER  IONIZATION OF WATER  PH  BUFFER  CONCLUSION
  • 3. INTRODUCTION Water is composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states. The strucutre of the water molecule gives water its unique properties. These properties include its high polarity, solvent, cohesive, adhesive properties, high specific heat capacity, and its ability to ionize. These charateristics make water a universal solvent, facilitating biochemical reactions, maintaining cellular structures, and regulating temperature in living organisms. Each molecule of water consists of one atom of oxygen and two atoms of hydrogen, so it has the chemical formula H₂O.
  • 4. STRUCTURE OF WATER MOLECULE Water consists of one atom of oxygen and two atoms of hydrogen which are held together by covalent bond, which is formed by sharing of 2 electrons. These bonds are formed because of higher electronegativity of oxygen atom. The oxygen atom attracts the shared pair of electrons of the covalent bonds towards itself than hydrogen atom. Has a result it has a region with a slight negative charge (the oxygen atom) and a region with a slight positive charge (the hydrogen atoms). The bond length between hydrogen and oxygen is 95.84 pm. It has bond angle 104.45’, with a bent shape.
  • 5. BIOCHEMICAL PROPERTIES OF WATER  Solvent property: Water is the universal solvent most of biological activities and chemical reactions occur in aqueous (water- based) solutions. It is a polar molecule with partially positive and negative charges, it readily dissolves small non polar covalent molecules, ionic compounds, and other polar covalent molecules .  Water soluble molecules are described as hydrophilic (water loving). Hydrophilic molecules dissolve in water. Those molecules that are not soluble in water are hydrophobic (water hating or fearing). Hydrophobic molecules repel water. Medium for chemical reactions- hydration/dehydration reactions.
  • 6. WATER IN REACTIONS When the ionic compounds are added to water, individual ions interact with the polar regions of water molecules during dissociation. Ex; Nacl crystals are added to water, it dissociates into Na+ and Cl- ions and the positively-charged sodium ion is surrounded by the partially - negative charge of the water molecule oxygen, the negatively-changed chloride ion is surrounded by the partially- positive charge of the hydrogen in the water molecule.
  • 7. POLARITY OF WATER Water is polar molecule because oxygen and hydrogen have different electronegativity value. Here oxygen attracts shared pair of electrons towards itself than hydrogen atom. It forms polar covalent bonds. This creates a partial positive charge on hydrogen and a partial negative charge on oxygen atom. Water has a variety of unusual properties because of attractions between these polar molecules. The slightly negative regions of one molecule are attracted to the slightly positive regions of nearby molecules, forming a hydrogen bond which is a weak bond. Water molecules attract each other through the special type of dipole-dipole interaction known as hydrogen bonding.
  • 8. AMPHIPROTIC NATURE OF WATER • Due to its highly polar structure, water can either act as an acid (by donating a proton to a base) or a base (by using a lone pair of electrons to accept a proton). • As bases: When a strong acid like Hcl dissolves in water, it separates into chloride ions (Cl–) and protons (H+). In turn, the proton reacts with a water molecule to form the hydronium ion (H3O+). Hcl (aq) + H2O(l) → H3O+(aq) + Cl–(aq) The acid in this reaction is Hcl, and the base is water, which accepts an H+ ion. • As acids: Water can also act as an acid. H2O donates a proton to NH3, which acts as a base. In this equilibrium reaction:H2O(aq) + NH3(aq) ⇆ (NH4) + OH- • Water is thus called amphiprotic because it can act as an acid or a base depending on the nature of the other reactant.
  • 9. ANOMALOUS BEHAVIOUR OF WATER. • It is a abnormal property of water where by it expands instead of contracting when temperature goes from 4 degree Celsius to zero degree Celsius and it became less dense. • Example : the density of ice is lower than water, so it floats on water. • At about 4 degree Celsius water reaches its maximum density ,behind its temperature water will always expand whether it is being warmed up or cooled down . • This characteristics of water plays significant role in sustaining marine life.
  • 10. Cohesion-water molecules stick to each other which are held together by hydrogen bonds.  Adhesion-water molecules stick to unlike surfaces such as glass or plastic due to hydrogen- bonds between water and other polar compounds. Surface tension-the property of the surface of liquid(water) that allows it to resist an external force due to the cohesive nature of its molecules. High specific heat- it takes a lot of energy to raise or lower the temperature of water. As a result, water plays a very important role in temperature regulation. High heat of vaporization- many hydrogen bonds must be broken before water can evaporate so it needs high heat.
  • 11. IONIZATION OF WATER The water molecule ionizes to form H+ and OH - ions. The reaction in which a water molecule donates one of its protons to a neighboring water molecule, either in pure water or in an aqueous solution, is called the self-ionization of water. In an self ionization process, one water molecule can react with another to form an OH– ion and an H3O+ ion:
  • 12. PH • PH=potential of hydrogen, (negative log of the concentration of hydrogen ions). • water ionizes, H+ splits off from H₂O, leaving OH- • If [H+] = [OH-], water is neutral. Ph = 7. • If [H+] > [OH-], water is acidic. Ph<7. • If [H+] < [OH-], water is basic. Ph>7. • PH scale measures the acidity or basicity of aqueous or other liquid solutions.
  • 13. BUFFERS Buffers are aqueous systems that resist Changes in PH when small amounts of a strong acid or base are added. Types of buffer solutions Acidic buffers:- These solutions are used to maintain acidic environments. Acidic buffer has acidic PH and is prepared by mixing a weak acid and its salt with strong base. The PH of this solution is below 7. Ex : Sodium acetate and Acetic acid.(PH 4.75). Alkaline buffers:- these buffer solutions are used to maintain basic conditions it is prepared by mixing week base and its salt with strong acid. PH of these solution is above 7. Ex: Ammonium hydroxide and Ammonium chloride (PH 9.25). • Control PH by buffers , reservoir of H+ Donate H+ when [H+] falls, Absorb H+ when [H+] rises.
  • 14. CONCLUSION • Water is an excellent solvent it has Unique ability to dissolve many polar and ionic substances it has unusual properties resulting from the water molecules polar structure that give rise to hydrogen bond. • The biochemical properties of water play vital roles in various biological processes, including solvent action, temperature regulation, and participation in metabolic reactions. Its unique properties, such as high specific heat, cohesion, and universal solvent ability, make it indispensable for life as we know it. • Further more, water's cohesive properties enable it to form hydrogen bonds.
  • 15. REFERENCE • Fundamentals of biochemistry, Dr. JL Jain, Dr. Sunjay Jain, Nithin Jain. S chand publications. Page no: 2-30. • Biochemistry, SC Rostogi, Tata MC Grew hill publications. • http:// biolibretexts.Org/courses—biochemical propreties of water.