Step 1
Measure volume of acid 25cm3 using a measuring cylinder and place in beaker
Step 2
Warm acid gently, stir with spatulas of solid until left with unneeded and left at to e bottom of the beaker
Step 3
Filter off excess reactant and collect filtrate in evaporating basin
Step 4
Heat filtrate to evaporate 1/2 of volume to give hot saturate solution
Step 5
Leave to cool and crystallise
Step 6
Dry crystals