This document discusses the process of saponification and how soap cleans dirt. It defines saponification as the production of soap from fats or oils. The key points are:
1) A soap molecule has a polar end that is water-soluble and a nonpolar end, forming an amphipathic molecule.
2) In the presence of soap, the nonpolar ends dissolve oil droplets, leaving the polar ends to form a stable water-in-oil emulsion that removes dirt.
3) The saponification value test determines the number of milligrams of potassium hydroxide needed to saponify 1 gram of a substance, providing information about its composition.
Introduction of fats, Reaction of fatty acids, Reaction of fats or oil- Hydrolysis, Hydrogenation, Halogenation, saponification, Drying of oil, Rancidity, Determination of acid value, saponification value, iodine value, acetyl value,
Properties of fats and oils/Organic chemistry 2/Neet preparation/ Reactions of fats and oil/Qualitative analysis of fats and oils
Also see videos:
Properties of fats and oils
https://youtu.be/ux09yaPPPHw
Qualitative analysis of fats and oils
https://youtu.be/WXO6Ggdjwvo
Hi dear students, in this presentation I had explained the introduction, sources, functions and chemistry of fats and oils. I had covered the chemical reactions of fats and oils too, which includes hydrolysis, hydrogenation, Rancidity and drying of oils.
I had covered acid value, saponification value, iodine value, ester value, acetyl value, Reichert meissl value and polenske value of fats and oils. After watching this presentation it will be be able to answer the following questions,
What are fats and oils?
What are fats and oils?
What are the qualitative analysis tests for fats and oils?
What is fatty acid?
What are saturated and unsaturated fatty acids?
What is the difference between fats and oils?
What is fatty acid?
What is triglyceride?
What are saturated and unsaturated fatty acids?
What are essential fatty acids?
What is omega 3 and omega 6 fatty acids?
How vanaspati ghee is made?
What is acid value?
What is acid number?
What is saponification value?
What is iodine value?
What is ester value?
What is acetyl value?
What is reichert meissl value?
Introduction of fats, Reaction of fatty acids, Reaction of fats or oil- Hydrolysis, Hydrogenation, Halogenation, saponification, Drying of oil, Rancidity, Determination of acid value, saponification value, iodine value, acetyl value,
Properties of fats and oils/Organic chemistry 2/Neet preparation/ Reactions of fats and oil/Qualitative analysis of fats and oils
Also see videos:
Properties of fats and oils
https://youtu.be/ux09yaPPPHw
Qualitative analysis of fats and oils
https://youtu.be/WXO6Ggdjwvo
Hi dear students, in this presentation I had explained the introduction, sources, functions and chemistry of fats and oils. I had covered the chemical reactions of fats and oils too, which includes hydrolysis, hydrogenation, Rancidity and drying of oils.
I had covered acid value, saponification value, iodine value, ester value, acetyl value, Reichert meissl value and polenske value of fats and oils. After watching this presentation it will be be able to answer the following questions,
What are fats and oils?
What are fats and oils?
What are the qualitative analysis tests for fats and oils?
What is fatty acid?
What are saturated and unsaturated fatty acids?
What is the difference between fats and oils?
What is fatty acid?
What is triglyceride?
What are saturated and unsaturated fatty acids?
What are essential fatty acids?
What is omega 3 and omega 6 fatty acids?
How vanaspati ghee is made?
What is acid value?
What is acid number?
What is saponification value?
What is iodine value?
What is ester value?
What is acetyl value?
What is reichert meissl value?
Microbiological assay-Principles and methods of different microbiological assay.someshwar mankar
Principles and methods of different microbiological assay. Methods for standardization of
antibiotics, vitamins and amino acids. Assessment of a new antibiotic.
Rancidification is the process of complete or incomplete oxidation or hydrolysis of fats and oils when exposed to air, light, or moisture or by bacterial action, resulting in unpleasant taste and odor. Specifically, it is the hydrolysis or autoxidation of fats into short-chain aldehydes and ketones, which are objectionable in taste and odor. When these processes occur in food, undesirable odors and flavors can result.
more chemistry contents are available
1. pdf file on Termmate: https://www.termmate.com/rabia.aziz
2. YouTube: https://www.youtube.com/channel/UCKxWnNdskGHnZFS0h1QRTEA
3. Facebook: https://web.facebook.com/Chemist.Rabia.Aziz/
4. Blogger: https://chemistry-academy.blogspot.com/
EDTA Titration
Microbiological assay-Principles and methods of different microbiological assay.someshwar mankar
Principles and methods of different microbiological assay. Methods for standardization of
antibiotics, vitamins and amino acids. Assessment of a new antibiotic.
Rancidification is the process of complete or incomplete oxidation or hydrolysis of fats and oils when exposed to air, light, or moisture or by bacterial action, resulting in unpleasant taste and odor. Specifically, it is the hydrolysis or autoxidation of fats into short-chain aldehydes and ketones, which are objectionable in taste and odor. When these processes occur in food, undesirable odors and flavors can result.
more chemistry contents are available
1. pdf file on Termmate: https://www.termmate.com/rabia.aziz
2. YouTube: https://www.youtube.com/channel/UCKxWnNdskGHnZFS0h1QRTEA
3. Facebook: https://web.facebook.com/Chemist.Rabia.Aziz/
4. Blogger: https://chemistry-academy.blogspot.com/
EDTA Titration
The process (similar to what we will be doing in lab) involved combining some form of fat with an alkali (basic) material. Most commonly the alkali was in the form of potash and pearlash, which contain KOH.
Name; Hasnain Nawaz
Surname : Shaikh
ROLL NO: 16 CH 42
B.E: Chemical Engineering (In Progress).
Mehran University of Engineering and Technology
Jamshore, ISO 9001 Certified.
Fats and oils are the major part of the lipid present in the adipose tissue of mammals. Fats and oils are the esters of fatty acids and alcohols and on hydrolysis gives fatty acids and alcohols. Fats and oils are mainly the glyceryl esters of various fatty acids like palmitic, stearic, oleic, linoleic and linolenic. These are also called as triglycerides as three molecules of fatty acids condense with one mole of glycerol to form fat.
Reductive Adaptation
When a child’s intake is insufficient, the needs of the body for energy are met by mobilising tissue reserves of fat and protein from muscle, skin and the gut. Physiological and metabolic changes also take place to conserve energy. These changes take place in an orderly progression called reductive adaptation.
Through reductive adaptation, energy is conserved by:
Reducing physical activity and growth
Reducing basal metabolism by slowing protein turnover, reducing the functional reserve of organs, slowing the sodium and potassium pumps in cell membranes and reducing their number
Reducing inflammatory and immune responses
Consequences of Reductive Adaptation
The changes caused by reductive adaptation have important consequences. The functioning of every cell, organ and system is affected. Here are some of the consequences:
The liver is less able to make glucose and is less able to excrete excess dietary protein and toxins
The kidneys are less able to excrete excess fluid and sodium
The heart is smaller and weaker and has a reduced output
The gut produces less acid, and smaller amounts of enzymes. Villi become flattened and motility is reduced.
Sodium leaks into cells due to fewer and slower pumps and potassium leaks out of the cells and is lost in urine
Iron that is liberated from red blood cells is not stored safely and so promotes the growth of pathogens and harmful free radicals
Muscle mass is reduced, so there is a loss of intracellular nutrients and glucose stores
The immune system does not give the normal responses to infection
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http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
1. Soaponification
• Ordinary Soap is a simple mixture of sodium
salt of long chain fatty acid.
• Soap made from olive oil is castile soap
• Alcohol is added to make it more transparent
• Perfumes dyes and germicide can be added.
• If Potassium salt is added it is soft soap.
• Soap dispersed in spherical cluster are called
miscelle.
2. A Soap molecule has a polar COONa
end and a non polar end, the long
carbon chain of 12-18 carbons.
4. • The polar end is water soluble
[hydrophillic]
• Non polar end is water
insoluble[hydrophobic]
• This are called as amphipathic
5. How do soap clean the dirt
• Water alone cannot dissolve the hydrophobic
substance .
• Oil droplet in contact with water tend to
coalesce [join] so that there is a water and oil
layer.
• But in presence of soap the non polar end of
soap dissolve the oil droplet, leaving the
carboxylate end projecting into the
surrounding water layer.
6. • Repulsion between similar charges keeps the
oil droplet from coalescing; a stable emulsion
of oil and water forms and can be removed
from the surface being cleaned.
• Cleansing property not only limited to
carboxylate salt but is possessed by other
amphiprotic molecule.
How do soap clean the dirt
7. • Hard water contains calcium and magnesium
salt which react with soap to form insoluble
calcium and magnesium carboxylate. [ the ring
in the bath tub]
• A detergent is a surfactant or mixture of
surfactants that has cleaning properties in
dilute solution with water. A detergent is
similar to soap, but with a general structure R-
SO4
-, Na+, where R is a long-chain alkyl group.
8.
9. Analysis of oils and fats
Prepared by
Dr. N.GOPINATHAN
ASSISTANT PROFESSOR
DEPARTMENT OF PHARMACEUTICAL CHEMISTRY
FACULTY OF PHARMACY
SRIHER [DU]
CHENNAI-116
TAMILNADU
11. Determination of saponification value
The saponification value is the
number of milligrams of KOH
necessary to neutralise the free
acids and to saponify the esters
present in 1 g of the substance
12. Why KOH is preferred over NaOH
Potassium hydroxide is also slightly smaller than
sodium hydroxide; therefore, it can penetrate oil
molecules faster than sodium hydroxide, thus
breaking the oil’s hold on surfaces quicker. Since
they are also more soluble, the oils can be
rinsed away easier, especially when using hotter
water or steam equipment
14. Principle- saponification value
The oil sample is saponified by
refluxing with a known excess of
alcoholic potassium hydroxide
solution. The alkali required for
soaponification is determined by
titration of excess KOH against the
standard HCl
16. Alcohol distillation
• Reflux 1.2 litre of ethanol with 10 g
of KOH and 6 g of granulated
aluminium or aluminium foil for 30
minutes.
• Distil it and collect 1 litre of ethanol
after discarding first 50 ml.
17. 0.5 m ethanolic KOH
• 30g of KOH in one litre of distilled
alcohol.
• Keep the temperature below 15 C while
dissolving alkali.
• Allow to stand overnight.
• Decant the clear liquid and store it in a
air tight container.
19. Preparation of 0.5 M HCl
Dilute 42.5 ml of concentrated HCl with water to
produce 1000 ml.
20. Standardisation of o.5M HCl
• Weigh accurately 1.5 g of anhydrous sodium
carbonate previously heated at about 270 C
for one hour.
• Dissolve it in 100 ml of water and add 0.1 ml
of methyl red solution.
• Add 0.5M HCl from burette with constant
swirling.
• Until the solution becomes faintly pink.
21. • Heat the solution to boiling , cool and
continue the titration, Heat again to boiling
and titrate further as necessary until the faint
pink colour is no longer affected by continued
boiling.
• Each ml of 0.5M HCl is equivalent to 0.02649g
of sodium carbonate
22. IP procedure
• Weight of oil mentioned in the individual
monograph otherwise
• Weigh 2 g of sample being examined into a
200 ml flask of borosilicate glass fitted with a
reflux condenser.
• Add 25 ml of 0.5 M ethanolic KOH and a little
pumice powder and boil under reflux on a
water bath for 30 minutes.
23. IP procedure
• Add 1 ml of phenolphthalein solution titrate
immediatley with 0.5 M HCl .
• Repeat the operation omitting the substance
being examined
25. Note
• If the oil purpose of preservation has been
saturated with carbon dioxide for the purpose
of preservation, gently reflux the solution of
the oil in ethanol 95 % and ether for 10
minutes before titration.
• The oil may be freed from the CO2 by
exposing it in a shallow dish in a vacuum
desiccator for 24 hours before weighing the
sample.
26. Significance of Saponification Value
•It gives an idea about the
average molecular weight of the
fat or oil.
Higher the molecular weight
of the fat , the smaller is its
saponification value.
27. Significance of Saponification Value
• It indicates the length of carbon chain of
the acid present in that particular oil or fat.
Higher the saponification value, greater is
the percentage of the short chain acids
present in the glycerides of the oil or fats
28. Significance
• To identify the given fatty oil.
• To distinguish between fatty oils
and mineral oils.
• In detecting the adulteration of
fat or oil.
29. • It also help to calculate the amount
of alkali required to convert a
definite amount of fat or oil into
soap.
• Detection of acids containing less
than 16 carbon or more than 18
carbon.
Significance