Aidan Gill, Heidi Foxford and, Dorothy Warren Solutions for Chapter: Elements, Compounds and Mixtures, Exercise 5: Exercise 5

Which method you would use to separate salt from a solution of salt water ?
Tick one box.

Which method you would use two separate copper turnings (small flakes of copper) from a mixture of iron filings and copper turnings ? 

Sam has been asked to separate the sand from a mixture of sand and gravel.
He uses this equipment.

Seama has been asked to separate sand from a mixture of sand and salty water.
She uses this equipment :

When a mixture of salty water is separated into water and salt, distillation can be used to collect the water. 
Name the two changes of state that occur during distillation. 
Choose two answers from the list below. 

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A mixture contains 100g of water and 10g of salt.

State the mass of salt left if all the water vapour evaporates. Explain your answer.

A dish contains black and yellow powder, which you predict is a mixture of iron and sulphur. When a magnet is moved over the dish, black particles fly up to the magnet and leaving a yellow powder behind. 
State if the result supports your prediction.
Explain the results of this test.

Sasha is growing crystals. She wants to grow some copper sulphate crystals, but someone has contaminated the copper sulphate with Chalk. 

Now she needs to get a purple sample of copper sulphate before she can start growing the crystals. 

Sasha plans her method. She looks in the equipment cupboard but  is not sure which pieces of equipment to use. 
Help sasha decide. 

Step 1: Mix the chalk- copper sulphate mixture with water and stir.

Step 2: Filter the mixture.

Step 3: evaporate the filtrate

For each step: 
Draw a labelled diagram

For each step: 
Explain why you have chosen the equipment.