Question

Identify the oxidising agent (oxidant) in the following reactions:
(a) Pb3O4 + 8HCl → 3PbCl2 + Cl2 + 4H2O
(b) 2Mg + O2→ 2MgO
(c) CuSO4 + Zn → Cu + ZnSO4
(d) V2O5 + 5Ca → 2V + 5CaO
(e) 3Fe + 4H2O → Fe3O4 + 4H2
(f) CuO + H2→ Cu + H2O

Answer 1

Pb3O4  

O2  

CuSO4

V2O5

H2O

CuO

Explanation:

(a) Pb3O4 + 8HCl → 3PbCl2 + Cl2 + 4H2O

Pb3O4 is the oxidizing agent.

(b) 2Mg + O2→ 2MgO

O2 is the oxidizing agent.

(c) CuSO4 + Zn → Cu + ZnSO4

CuSO4 is the oxidizing agent.

(d) V2O5 + 5Ca → 2V + 5CaO

V2O5 is the oxidizing agent.

(e) 3Fe + 4H2O → Fe3O4 + 4H2

H2O is the oxidizing agent.

(f) CuO + H2→ Cu + H2O

CuO is the oxidizing agent.

Answer 2

Explanation:

(a) Pb3O4 +8HCI3PbCI2+CI2 +4H20

Pb304 is the oxidizing agent.

(b) 2Mg+ o2 2Mgo

02 is the oxidizing agent.

(c) CuSO4 + Zn Cu + ZnS04

CusO4 is the oxidizing agent.

(d) V205+5Ca 2V+5CaO

v205 is the oxidizing agent.

(e) 3Fe + 4H20 Fe304+4H2

H20 is the oxidizing agent.

() CuO+ H2 Cu + H20

CuO is the oxidizing agent.