Write down the reaction equations: a) sodium → sodium hydroxide → sodium nitrate;

Write down the reaction equations: a) sodium → sodium hydroxide → sodium nitrate; b) potassium hydroxide → potassium carbonate; c) copper (II) oxide → copper (II) chloride → copper (II) hydroxide d) Calcium oxide → calcium hydroxide → calcium chloride e) zinc oxide → zinc nitrate → zinc hydroxide → zinc sulfate f) barium hydroxide

A) 1) 2Na + 2H2O → 2NaOH + H2 ↑ (substitution reaction);

2) NaOH + HNO3 → NaNO3 + H2O (exchange reaction).

B) 1) 2KOH + H2CO3 → K2CO3 + 2H2O (exchange reaction).

C) CuO + HCl → CuCl2 + H2O (exchange reaction);

2) СuCl2 + 2KOH → Cu (OH) 2 ↓ + 2KCl (exchange reaction);

D) 1) CaO + H2O → Ca (OH) 2 ↓;

2) Ca (OH) 2 ↓ + 2HCl → CaCl2 + 2H2O.

E) 1) ZnO + 2HNO3 → Zn (NO3) 2 + H2O (exchange reaction);

2) Zn (NO3) 2 + 2NaOH → Zn (OH) 2 + 2NaNO3 (exchange reaction);

3) Zn (OH) 2 + H2SO4 → ZnSO4 + 2H2O (exchange reaction).

Е 1) Ba (OH) 2 + 2CH3COOH → Ba (CH3COO) 2 + 2H2O (exchange reaction).