Write the reaction equation: Ba – Ba (OH) 2 – Ba (NO3) 2 – BaCO3 – BaCl2

1) Ba + 2H2O = Ba (OH) 2 + H2 (when barium interacts with water, barium hydroxide and hydrogen are formed);

2) Ba (OH) 2 + 2HNO3 = Ba (NO3) 2 + 2H2O (when barium hydroxide interacts with nitric acid, barium nitrate and water are formed);

3) Ba (NO3) 2 + Ag2CO3 = BaCO3 + 2AgNO3 (when barium nitrate interacts with silver carbonate, barium carbonate and silver nitrate are formed);

4) BaCO3 + 2HCl = BaCl2 + CO2 + H2O (when barium carbonate interacts with hydrochloric acid, barium chloride, carbon dioxide and water are formed).