Question

Write balanced chemical equations to show how you would obtain.
(a) lead nitrate from lead hydroxide.
(b) potassium chloride from potassium hydroxide
(c) calcium chloride from calcium carbonate.
(d) sulphurous acid from sulphur dioxide.
(e) sodium nitrate from sodium carbonate.

Answer 1

(a) Lead hydroxide reacts with nitric acid to form lead nitrate.

Pb(OH)₂ (aq) + 2HNO₃ (aq) $\to$ Pb(NO₃)₂ (aq) + 2H₂O (l)


(b) Potassium hydroxide reacts with hydrochloric acid to form potassium chloride.

KOH (aq) + HCl (aq) $\to$ KCl (aq) + H₂O (l)


(c) Calcium carbonate reacts with hydrochloric acid to form calcium chloride.

CaCO₃ (aq) + 2HCl (aq) $\to$ CaCl₂ (aq) + H₂O (l) + CO₂ (g)


(d) Sulphur dioxide reacts with water to form sulphurous acid.

SO₂ (g) + H₂O (l) $\to$ H₂SO₃ (aq)


(e) Sodium carbonate reacts with nitric acid to form sodium nitrate.

Na₂CO₃ (aq) + 2HNO₃ (aq) $\to$ 2NaNO₃ (aq) + H₂O (l) + CO₂ (g)