How to balance complicated chemical equations?
Every chemical equation balances MASS and CHARGE.......
You gots a metal carbonate, say
Are mass and charge balanced here? If they are not then you cannot accept the equation as a representation of chemical reality. And if you start with
The lesson that I try to reinforce is that
Carbonates (and these are often insoluble salts) react with acids according to the following net ionic equation......
You simply have to know these reactions, and how to balance them stoichiometrically.
And likewise for bicarbonates......
Bicarbonate salts TEND to be soluble. Carbonate salts tend to be insoluble. But this is the province of experiment.