Question

?+?=CaCO3KOH+?=K2CO3+H2O

Answer 1

CaO+CO2=CaCCO3
2KOH+H2CO3=K2CO3+2H2O

Answer 2

The chemical equation you provided seems to be incomplete as it contains some missing information. Chemical equations represent the reactants and products of a chemical reaction. Each element and compound must be balanced on both sides of the equation.

However, I can provide you with a balanced chemical equation for the reaction between Calcium Carbonate (CaCO3) and Potassium Hydroxide (KOH) to form Potassium Carbonate (K2CO3) and Water (H2O):

CaCO3 + 2 KOH → K2CO3 + H2O

In this balanced equation, one molecule of Calcium Carbonate (CaCO3) reacts with two molecules of Potassium Hydroxide (KOH) to form one molecule of Potassium Carbonate (K2CO3) and one molecule of Water (H2O).