Question

3. Write balanced equations, with state symbols for the following reactions:


i) Calcium reacting with water to form a solution of calcium hydroxide and hydrogen gas.

ii) Barium oxide reacting with hydrochloric acid to form a solution of barium chloride and water

iii) Calcium carbonate reacting with hydrochloric acid to form aqueous calcium chloride, carbon dioxide gas and water.

Answer 1

i) Ca (s) + 2H₂O (l) --> Ca(OH)₂ (s)+ H₂ (g)

ii) BaO (s) + 2HCl (l) --> BaCl₂ (aq) + H₂O (l)

iii) CaCO₃ (s) + 2HCl (l) --> CaCl₂ (aq) + H₂O + CO₂ (g)