solutions and suspensions

Solutions and

Suspensions

What is a Solution? • Solute: is a substance that dissolves.• Solvent: is a substance that the solute

dissolves in and forms the bulk of the solution.

SOLUTION: is a mixture of solute &

solvent.

State any 4 examples of a Solution.

1)Salt water2)Lemonade3)Tea4)Honey5)Milk

Nature of solutions

• The solute breaks down into tiny particles that mix completely and evenly with the particles of solvent.

• A solution is homogeneous, that is that its colour, density, and other physical and chemical properties are the same in every part of the solution.

• The light can pass thru it.

Can we proof these statements?

A beam of light passes thru a salt solution. No residue is left behind when a solution is filtered.

What is a Suspension?

A suspension is a mixture in which small solid or liquid particles are suspended in a liquid or a gas. For example, chalk is insoluble in water. Thus, a mixture of chalk and water forms a suspension.

A suspension of powdered chalk in water.

Examples of a suspension:

• 1. Chalk in water 2. Medicine 3. Paint 4. Clay in water 5. Oil in water

Nature of suspension:

• The solute do not break down into tiny particles that mix completely and evenly with the particles of solvent as in the solution.

• A suspension is non-homogeneous, that is that its colour, density, and other physical and chemical properties are not the same in every part of the solution.

• The light cannot pass thru it.

Experiments that proof this statement:

Residue is left behind when a suspension is filtered.

SOLUBILITY Solubility is the maximum amount

of solute which will dissolve in a given amount of solvent at a fixed temperature. The three main factors affecting the solubility of a solute in a solvent are:

1. The nature of the solute,2. The nature of the solvent,3. The temperature of the solutions.

The maximum amount solute which can salt (solute) that can dissolve in

the glass of water (solvent).

Determining the Strength of solutions

• If a substance is dilute or concentrated it means that the solvent contains less or more solute in it.

• If sugar is added to a 100g of water in a beaker

and then stirred, it’ll be dissolved in the water.

if we add more sugar and it goes not dissolves anymore, than it means that a saturated solution of salt in water is obtained.

Useful Applications of Solvent

and SolutionsThe air we breathe and the water we drink are the examples of solutions

and solvents that keep us alive.

In homes…• Water, as a solvent, is commonly

used in homes for cooking, washing, bathing and making drinks. Tea leaves do not dissolve in water, but some of their flavours does. Glucose, coffee and other beverages are made into aqueous solutions before they are drunk. Water also dissolves detergents and many types of stains and hence, it is used for cleaning.

common solvents and solutions and solvent used in homes.

In industries…