SOLUTIONS By; Umar Mahmood Teacher: Ms Seema Adl. Class V II- S

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Presentation transcript:

SOLUTIONS By; Umar Mahmood Teacher: Ms Seema Adl. Class V II- S D. Crowley, 2007

Solutions, Solvents & Solutes Friday, April 05, 2019 Solutions, Solvents & Solutes What are they?

Pure or Mixture Look at the different liquids - are these pure, or are they mixtures? Explain your answer with reference to particles… So, if lots are things are jumbled up together we have a mixture, e.g. sea water is a mixture of water particles, salt particles, different chemical particles etc… Look at this ‘pure’ water - what happens when some sugar is added to it? I now have a mixture of water & sugar; but the sugar seems to have disappeared!

Solutions The sugar has not disappeared - instead it has dissolved in the water We would call the water + sugar a solution A solid dissolved in a liquid makes a solution In a solution the liquid is called the solvent, and the solid is called the solute Solute Solvent Solution

They all sound the same! Solute Solvent Solution Solution - the mixture formed when a substance dissolves in it Solute - the substance that dissolves Solvent - the liquid in the solution Dissolve - mixing of a substance in a liquid Soluble - a substance which can dissolve (mix in a liquid) Insoluble - a substance which cannot dissolve (mix in a liquid)

SATURATED AND UNSATURATED SOLUTIONS Saturated solution: A solution that can hold no more of the solute at a particular temperature is said to be a saturated solution at that temperature. Unsaturated solution: An unsaturated solution is a solution, which contains less amount of solute than is required to saturate it at that temperature.

EXAMPLES Look at the examples Salt added to water: - The solute is the The solvent is the This makes a The salt is as it has soluble salt water solution dissolved Flour added to water. Stirring it makes it go cloudy, but after a while all the flour grains sink to the bottom: - The flours has not This is because flour is dissolved insoluble

Types of Matter

DILUTE SOLUTION Dilute Definition: a solution containing a relatively small quantity of solute as compared with the amount of solvent. This term is the opposite of 'concentrated'.