Question

Write the balanced equation and identify the type of reaction.

1. Magnesium Hydroxide_(aq) + Nitric Acid_(aq) → Magnesium Nitrate_(aq) + Water_(l)

2. Magnesium_(s) + Carbon Monoxide_(g) → Magnesium Oxide_(s) + Carbon_(g)

3. Barium Chloride_(aq) + Sodium Sulphate_(aq) → Barium Sulphate_(s) + Sodium Chloride_(aq)

4. Sodium Nitrate_(s) → Sodium Nitrite_(s) + Oxygen_(g)
 

Answer 1

1.  Mg(OH)_2(aq) + 2 HNO_3(aq) → Mg(NO₃)_2(aq) + 2 H₂O_(l)

It is both double displacement and neutralisation reaction.

2.  Mg_(s) + CO_(g) → MgO_(s) + C_(s)

It is a redox reaction in which magnesium is oxidised and carbon monoxide is reduced.

3.  BaCl_2(aq) + Na₂SO_4(aq) → BaSO_4(s) ↓ + 2 NaCl_(aq)

It is both precipitation and double displacement reaction.

4.  2 NaNO_3(s) → 2 NaNO_2(s) + O_2(g)

It is both endothermic and decomposition reaction.