When a solute dissolves in a solvent, it forms a solution that is homogeneous and has consistent properties throughout. Key characteristics of solutions include:
- Solutes dissolve into individual particles in the solvent.
- Properties like freezing point and boiling point of the solvent are changed by the amount of solute present.
- The amount of solute that can dissolve is dependent on factors like temperature, pressure, and the molecular structures of the solute and solvent.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
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.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
2. A solution is a type of mixture.
Solution: a type of mixture that is the
same throughout.
A solution can be physically separated
All portions of the solution have the same
properties
Homogeneous: the same
Examples: salt water, blood, sugar
water, gasoline
3. Solutes and Solvents
Solute: a substance that is dissolved to
make a solution.
when dissolved it separates into individual
particles
Solvent: is a substance that dissolves a
solute.
when the solute is dissolved into the solvent it
is not possible to identify the solvent and solute
as individual parts
4. Examples of Solutes and Solvents
Saltwater:
salt=solute,
water=solvent
Blood: calcium ions,
sugars=solutes,
water =solvent
saltwaterfishing365.com
ucdavismagazine.ucdavis.edu
5. Types of Solutions
Solutions can be made from
solids, liquids, and gases
Air: solute=oxygen,
solvent=nitrogen (oxygen is
dissolved in nitrogen)
Humidity: solute=liquid,
solvent=gas (water is
dissolved into air)
Stainless steel:
solute=chromium metal,
solvent=iron (chromium
metal is dissolved in iron to
form a shiny steel)
www.germes-online.com
askville.amazon.com
6. Suspensions
Suspension: a mixture in which
different parts are identifiable as
separate substances
(heterogeneous mixture)
Heterogeneous: different, not the
same
Flour and water. The suspension
looks cloudy and can be separated
by using a filter. www.chemistrydaily.com
7. Solvent and Solute Particles Interact
The parts of a solution can be physically
separated because they are not changed
into new substances.
The way a solid compound dissolves in a
liquid depends on the bond type.
Ionic( e- are lost or taken)
Separate into ions (+ or – charged particles) in the
solution
Covalent ( e- are shared)
Separate into individual molecules (2 or more
elements combined together)
8. Properties of Solvents change in
Solutions
A solution’s physical properties are
different from the physical properties of the
pure solvent.
The amount of solute in the solution
determines how much the physical
properties of the solvent are changed
9. Lowering the freezing point
Freezing point: temperature
at which a liquid becomes a
solid
The freezing point of a
liquid solvent decreases
when a solute is dissolved
in it.
Example
Water, pure = 0 degrees C.
Water + salt = a freezing point
lower than 0 degrees C.
coolcosmos.ipac.caltech.edu
10. Lowering the freezing point
Making Ice Cream
Depends on lowering the freezing point of a
solvent
Canister hold liquid ice cream ingredients
Put in a larger container containing ice and salt
Salt lowers the freezing point of the mixture
Causes ice to melt (absorbing heat from
surroundings)
Ice cream mix is chilled when its contents are
constantly stirred
Tiny ice crystals form all at once instead of gradually
Causing the ice cream to be smooth and creamy
11. Raising the boiling point
Boiling point: temperature
when a liquid turns into a
gas
A solution’s boiling point can
be raised by the amount of
solute in the solvent.
Example:
Antifreeze added to cars
prevent it from
overheating or having the
liquid’s reach their boiling
point
www.state.tn.us
www.classic-car-magazine.co.uk
12. The amount of solute that dissolves can
vary
Concentration: The amount of
solute dissolved in a solvent at
a given temperature.
Examples:
Hot chocolate…the more
powdered mix you add the higher
the concentration of chocolate
Lemonade…the more frozen
lemon concentrate or powdered
mix you add the more tart the
drink becomes
www.thesunblog.com
13. Degrees of Concentration
Dilute: a solution has a low concentration
of solute
Saturated: a solution that contains the
maximum amount of solute that can be
dissolved into the solvent at a given
temperature.
Supersaturated: a solution can contain
more solute than normal by raising the
temperature of the solvent.
www.seroundtable.com
14. Solubility
Solubility: the amount of the substance
that will dissolve in a certain amount of
solvent at a given temperature.
The solubility of a solute can be changed
by raising the temperature
If solute is a gas…then you can change the
pressure…higher pressure of gas in a liquid
increases the amount of gas that can be
dissolved
15. Solubility and Temperature
Solute Increased
Temperature
Decreased
Temperature
Solid Increase in
solubility
Decrease in
solubility
Gas Decrease in
solubility
Increase in
solubility
16. Solubility and Pressure
Solute Increased
Pressure
Decreased
Pressure
Solid No effect on
solubility
No effect on
solubility
Gas Increase in
solubility
Decrease in
solubility
17. Solubility depends on Molecular Structure
When a substance
dissolves, its molecules
(covalent bonds) or ions
(ionic bonds) separate
from one another and
become evenly mixed with
molecules of the solvent
Water contains polar
covalent bonds.
Negative region (O)
Positive region (H)
www.emc.maricopa.edu
18. Polar and Nonpolar
Water and oil do not mix
Water is polar…negative and
positive regions
Oil is nonpolar...no charge
Molecules are not attracted to each
other (opposite charges attract
each other) so they do not mix
Water and sugar or salt mix
Water is polar
Salt and sugar are also polar
Opposite charged molecules are
attracted to each other
www.historyforkids.org
19. Solutions can be acidic, basic, or neutral
Acid Base
Donate H+ ion
(proton…atomic number
is 1=1 proton)
Can accept a H+
ion...usually release an
OH- ion than can accept
a H+ ion.
Taste sour Taste bitter
Produce burning or
prickling sensation on
skin
Feel slippery
React with most metals
21. pH scale
pH scale: potential of Hydrogen
Higher H+ lower number (Acid)
Lower H+ higher number (Base)
Range is 0-14, 7 is neutral
Common Acids and Bases
Base: Soap pH 10
Acid: lemon juice pH 2
Acids and Bases neutralize each other
22. Metal alloys are solid mixtures
Alloy: a mixture of one or
more metals and one or more
other elements…made from
melting and mixing
Examples:
Brass: zinc and copper
Bronze: tin and copper
Stainless steel: chromium
and iron
www.kengem.com
art-foundry.com