Soluble : will dissolve or spread all through the liquid Insoluble : will not dissolve in the liquid Solute : a solid dissolved in a liquid Solvent : the liquid a solid dissolves in

No Materials/substances

Condition after mixing with water

Dissolve / not dissolve

Mixture/ solution

1 Sugar The sugar seems disappear

Dissolve Solution

2 Salt The salt seems disappear

Dissolve Solution

3 Instant coffee

The water colour change into brown

Dissolve Solution

4 Sand The sand sink Not dissolve Mixture

5 Flour After a while the flour sink again

Not dissolve Mixture

6 Red syrup The water colour change into red

Dissolve Solution

7 Baking Powder

There is bubles produced and the powder sink

Not dissolve (the bubbles show reaction that produce gas)

Mixture

3. colander

Tools for separating mixture 1. sieves

2. paper sieves

Water and sand Decanting

Ways of separation

Liquid

Solids

Oil

Water

Mixture Ways of separation

Evaporate the water

Filtering using paper sieve

Evaporate the water

Water and salt

Ways of separation

1. State true or false for each sentence!A. Salt will dissolve in water. ( )B. Sugar dissolves quicker in hot water than cold

water. ( )C. When sweet tea is heated, the sugar evaporates.

( )D. Stirring makes insoluble solids dissolve quicker.

( )

a. What can they do to make Stage A quicker?b. What substance is removed at Stage B?c. What substance remains in the evaporating

dish at Stage C?d. Complete these two sentences. Choose

words from the list.insoluble solvent solid soluble solution

A solid dissolved in water is a ……………. A substance that can dissolve in water is

……….

Which student has the correct answer to the teacher’s question? Choose from student A, B, C or D.

A. What has happened to the salt?

B. She then pours some of the solution into a basin and heats it.

When the salt solution is heated salt crystals are formed.What has happened to the water?