Write down the reaction equation: K2CO3 – KHCO3 – CO2 – MgCO3 – Mg (HCO3) 2

1) K2CO3 + H2CO3 = 2KHCO3 (when potassium carbonate interacts with carbonic acid, potassium bicarbonate is formed);

2) KHCO3 + HCl = KCl + CO2 + H2O (when potassium bicarbonate interacts with hydrochloric acid, potassium chloride, carbon dioxide and water are formed);

3) CO2 + MgO = MgCO3 (when carbon dioxide interacts with magnesium oxide, magnesium carbonate is formed);

4) MgCO3 + H2CO3 = Mg (HCO3) 2 (when magnesium carbonate interacts with carbonic acid, magnesium bicarbonate is formed).