The reaction equation between 1) potassium carbonate and barium chloride

The reaction equation between 1) potassium carbonate and barium chloride 2) sodium hydroxide and carbon dioxide 3) iron and oxygen 4) aluminum and hydrochloric acid

1. As a result of the reaction between barium chloride and potassium carbonate, barium carbonate and potassium chloride are formed.

BaCl2 + K2CO3 = BaCO3 + 2KCl;

2. In the interaction of alkali-sodium hydroxide-and carbon dioxide, a salt of carbonic acid is formed – sodium carbonate and water.

2NaOH + CO2 = Na2CO3 + H2O

3. Iron actively burns, forming two of its oxides (FeO – iron oxide (II) and iron (III) oxide -Fe2O3) – iron scale;

3Fe + 2O2 = 2Fe 3O4 (FeO * Fe2 O3) – iron scale

4. When aluminum and hydrochloric acid react, aluminum chloride and hydrogen are formed.

2Al + 6HCl = 2AlCl3 + 3H2.