(a) Give two reasons why the cup contains:
i) a mixture
ii) a heterogeneous mixture
iii) a suspension.

(b) Give two possible methods to separate this mixture.

(a) Name the separating technique used by Kemi.

(b) Explain how this technique is used in the experiment.

(c) Name the purple solid indicated on the diagram.

(d) What is the purpose of the ice?

(a) Name the substances b and c.

(b) Name the apparatus a.

(c) Identify the distillate d collected in the beaker.

(d) How would you determine that the distillate collected is a pure substance?

(e) Briefly explain how this separation technique works.

(f) Boiling chips are sometimes added to the substance in the flask. What is the purpose of this?

(a) Name the separation technique

(b) Provide labels for letters a to d.

(c) Apparatus a in the diagram above is folded in a specific way before use. Place the folding steps in the correct order.

(d) Describe the type of mixture that can be separated by this method.

(e) Why can this method not be used to separate a salt water solution?

(f) Give one example of using this separation method in your home. Describe the substances that are separated.

(g) All cars have engine air filters, which are a necessary for proper engine operation. What is the main purpose of a car air filter?

(a) Substance made of identical particles

(b) Substance containing different particles

(c) A mixture of gases surrounding us

(d) The separation technique that uses differences in boiling points

(e) Separating technique used to removing chlorophyll pigment from leaves

(f) The process where crude oil is allowed to condense into various liquids, such as gasoline

(g) A liquid in which a substance dissolves

(h) Material deposited on a filter

(i) An insoluble substance that forms during a chemical reaction

(j) A mixture made of very fine particles that are indefinitely suspended in the mixture

(a) Copper metal is a reddish brown substance that cannot be decomposed into simpler substances using chemical methods.

(b) Copper metal reacts with oxygen to form copper oxide.

(c) Brass is an alloy of copper (70%) and zinc (30%).

(d) Copper ore consists of copper minerals and rock.

(a) How would you separate a mixture of iron and copper filings?

(a) Name the separation methods he needs to carry out.

(b) Explain how he would carry out the methods named in a).

(a) Explain the general relationship shown by the graphs.

(b) Which of potassium nitrate or copper sulphate is least soluble around 0 °C?

(c) The sand was separated from the solution first. Explain the separating technique that was used.

(d) Then some of the water is boiled away. What is the name of this separating technique?

(e) The solution is then cooled in ice water. Which salt will crystallise first?

(f) What is this special case of the crystallisation separating technique called?