But these are chemical bases.
We are using copper carbonate to neutralise sulphuric acid.
The reaction produces carbon dioxide which we test with limewater
The blue solution that is made has bits of unreacted green copper carbonate in it
We have made lots of copper sulphate solution too
We need to separate them by filtration
the residue is the insoluble copper carbonate
We heat the filtrate, copper sulphate solution, to evaporate the solvent, water, and leave us with the solute, copper sulphate crystals.
