What will this mixture look like? Can you think of three different appearances? What would happen if I add a solid (solute) to a solvent (say water)? Can you think of three things that may happen?

Solution Colloid Suspension You could get a solution (clear and even), a colloid (cloudy and even) or a suspension (cloudy and uneven). Today we are looking a suspensions. How do you think you could separate the solid (solute) from the solvent?

Solute (the solid) Solvent (the water) When one thing dissolves in another, it is called a solution. If the solvent is water, it is called an aqueous solution. What would happen if I add a solid (solute) to a solvent (say water)? Can you think of three things that may happen?

Soluble and Insoluble If it dissolves = soluble. If it does not dissolve = insoluble.

Dancing Sultanas Explain how the sultanas rise to the surface. When the sultanas get to the surface why do they drop back to the bottom?

Making Fizz Bi-carbonate of soda and vinegar is a chemical reaction that produces carbon dioxide gas or CO2 (g) This is the same gas that is in soft drinks.

A Matter of Concentration Which of the following do you think is concentrated, diluted or saturated?

Concentrated = more solute is added to the solvent. Diluted = less solute is added to the solvent. Saturated = no more solute can dissolve in the solvent.

Questions Is fizzy soft drink a solution, solvent or solute? List the solutes likely to be found in a bottle or can of fizzy soft drink. What leaves a fizzy drink to cause it to go flat? What substance is added to cordial to make it more dilute? Describe how an aqueous solution is different from other solutions.

Questions 6. Copy and complete this table by filling in the ‘Solvent’ and ‘Solutes’ columns. Solution Solvent Solutes Soft drink Sea water Swimming pool water Jelly Cup of coffee

Questions A bottle of soft drink left lying in the sun may burst open. Explain why. What is the difference between a concentrated solution and a saturated solution? What substance should you add to salt water to make it: more concentrated less concentrated?