Required practical: making salts

Question 1

Step 1

Answer 1

Fill a beaker with a fixed volume of dilute sulfuric acid: the limiting reactant
Place on top of a Bunsen burner

Question 2

Step 2

Answer 2

Heat the acid until almost boiling (so it doesn’t boil over when other reactants added)

Question 3

Step 3

Answer 3

Use a spatula to add small amounts of copper oxide to the acid whilst stirring with a glass rod

Question 4

Step 4

Answer 4

Continue adding copper oxide if the solution remains blue, until some powder remains after stirring
This shows the reaction has stopped and all acid has reacted

Question 5

Step 5

Answer 5

Use filtration to remove unreacted/ in excess copper oxide
We can use filtration as it’s insoluble (not reacted)

Question 6

Step 6

Answer 6

Create crystals of salt using evaporation
Place over beaker of boiling water until half the solution remains

Question 7

Step 7

Answer 7

Leave copper sulfate crystals in a cool place to crystallise