Question

➢ Distinguish the following pair of salts by the help of chemical test including the relevant balance equation along with the observation and inference (conclusion) 1. Calcium carbonate and Copper carbonate 2. Potassium nitrate and magnesium nitrate 3. Zinc oxide and lead oxide 4. Cupric oxide and Aurgentous oxide​

Answer 1

Answer:

(a) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)

2KBr

(aq)

+BaI

2

(aq)

→2KI

(aq)

+BaBr

2

(s)

In this reaction, both the reactants exchanges ions to for two new products, hence, it is a double displacement reaction

(b) zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)

ZnCO

3

(s)

→ZnO

(s)

+CO

2

(g)

In this reaction, a single substance yields two different product. hence, it is a decomposition reaction

(c) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)

H

2

(g)

+Cl

2

(g)

→2HCl

(g)

In this reaction, two different reactants react with each other to form a single product. Hence, it is called a combination reaction

(d) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)

Mg

(s)

+2HCl

(aq)

→MgCl

2

(aq)

+H

2

(g)

In this reaction, more reactive Mg is replacing less reactive H. Hence, it is displacement reaction