Acid salt is the product of partially neutralized acid. If it continues to react with alkali, some are pure neutralized; Some neutralization is accompanied by precipitation and gas generation; At the same time, due to different reaction conditions and amount of substances, the ions actually participating in the reaction are also different. The types and writing methods of ion equations for the reaction of acid salts and bases are summarized as follows:
1. Acid base neutralization type
If the reaction between acid salt and base is pure acid base neutralization reaction, the ion equation is relatively simple;
2. Neutralization sedimentation type
It has nothing to do with the amount of reactants: no matter what the ratio of the amount of reactants participating in the reaction is, from the perspective of ion ratio, it is just neutralization and precipitation, then the ion equation is unique.
It is related to the amount of reactants: the amount of reactants varies from