Soluble/Insoluble Salts Flashcards
1
Q
Describe the experiment to make a soluble salt like copper 2 sulphate?
A
Add sulphuric acid to beaker Add copper oxide bit by bit and stir until no more dissolves. Add heat if neccesary. Add excess copper oxide. Filter Heat the copper sulphate to concentrate it. Allow to cool slowly and form crystals. Dry the substance.
2
Q
Give an example of a soluble salt.
A
copper 2 sulphate
3
Q
Why do you add excess copper oxide.
A
To ensure all sulphuric acid has reacted.
4
Q
How do you make an insoluble salt?
A
Add two soluble salts together.
5
Q
Describe an experiment to make and insoluble salt like PbCl2.
A
Pour two soluble salts into the test tube to make the precipitate. Filter Wash with distilled water. Dry between two bits of filter paper. Dry in warm oven.
6
Q
What is PbCl2?
A
A white precipitate.
