TOPIC 4.2 WATER AS A SOLVENT

Which of the following will not form a solution?

• oil and water

• sugar and water

• detergent and water

• coffee powder and water

Identify a solute in fizzy drinks.

• Oil

• Water

• Carbon dioxide

• Aluminium can

Figure shows an experiment on dissolving salt in water. Which of the following could increase the solubility of salt in water?

• Decreasing the temperature of water.

• Increasing the temperature of water.

• Stirring the mixture fast.

• Using a larger container.

Carbon dioxide dissolves in water to make carbonated drinks. Which of the following correctly describes water and carbon dioxide?

• Carbon dioxide - a solute, water - a solvent

• Carbon dioxide - a solvent, water - a solute

• Carbon dioxide - a solute, water - a solution

• Carbon dioxide - a solution, water - a solute

Salt and sugar can dissolve in water. Which of the following correctly describes salt, sugar and water?

• salt - solute, sugar - solute, water - solution

• salt - solute, sugar - solute, water - solvent

• salt - solution, sugar - solute, water - solute

• salt - solvent, sugar - solution, water - solute

What is a solvent?

• The substance in which the solute dissolves.

• The substance that dissolves.

• The mixture of solute and solvents.

• The process of colour changes.