Question

1. write a balanced chemical equation to represent each reaction described below. (a) silver reacts with gold(iii) nitrate. (b) copper reacts with lead(ii) sulphate.

Explanation:

Step1: Determine the reactants and products for (a)

Silver (Ag) reacts with gold(III) nitrate ($Au(NO_3)_3$) in a single - displacement reaction. Silver will displace gold. The products are silver nitrate ($AgNO_3$) and gold (Au).
$3Ag + Au(NO_3)_3=3AgNO_3 + Au$

Step2: Determine the reactants and products for (b)

Copper (Cu) reacts with lead(II) sulphate ($PbSO_4$) in a single - displacement reaction. Copper will displace lead. The products are copper(II) sulphate ($CuSO_4$) and lead (Pb).
$Cu + PbSO_4=CuSO_4 + Pb$

Answer:

(a) $3Ag + Au(NO_3)_3=3AgNO_3 + Au$
(b) $Cu + PbSO_4=CuSO_4 + Pb$