Potassium hydroxide will react with: sodium sulfite, zinc oxide, sulfur oxide 4, sulfuric acid?

2KOH + ZnO = K2ZnO2 + H2O

2KOH + SO2 = K2SO3 + H2O

2KOH + H2SO4 = K2SO4 + H2O

1. The reaction with sodium sulfite does not make sense. It could be an exchange reaction between complex substances, if gas, water or sediment were formed. But during the exchange, none of the above is formed.

2. The reaction with zinc oxide takes place for the reason that this oxide is amphoteric.

3. The reaction with sulfur oxide proceeds as this oxide is acidic.

4. The reaction between alkali and acid takes place almost always. This is a neutralization reaction.

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