Balance the following equations in acidic medium by both oxidation number and ion electron methods and identify the oxidants and the reductants:
Equations:
(i) MnO₄ ⁻(aq) + C₂H₂O₄(aq) ⟶ Mn²⁺(aq) + CO₂(g) + H₂O(l)
(ii) H₂S(aq) + Cl₂(g) ⟶ S(s) + Cl⁻(aq)
(iii) MnO₄ ⁻(aq) + C₂H₅OH(aq) ⟶ Mn²⁺(aq) + CO₂COOH(aq)
(iv) Bi(s) + NO₃ ⁻(aq) ⟶ Bi³⁺(aq) + NO₂(g)
(v) Cr₂O₇ ²⁻(aq) + C₂H₄O(aq) ⟶ Cr³⁺(aq) + C₂H₄O₂(aq)
(vi) MnO₄ ⁻(aq) + Br⁻(aq) ⟶ Mn²⁺(aq) + Br₂(aq)
(vii) Cu(aq) + NO₃ ⁻(aq) ⟶ Cu²⁺(aq) + NO₂(g)
(viii) H₂S(g) + Fe³⁺(aq) ⟶ Fe²⁺(aq) + S(s) + H⁺(aq)
(ix) I⁻(aq) + IO₃ ⁻(aq) + H⁺(aq) ⟶ I₂(aq) + H₂O(l)
(x) I⁻(aq) + O₂(g) + H₂O(l) ⟶ I₂(aq) + OH⁻(aq)

Question

Balance the following equations in acidic medium by both oxidation number and ion electron methods and identify the oxidants and the reductants:

Equations:

(i) MnO₄ ⁻(aq) + C₂H₂O₄(aq) ⟶ Mn²⁺(aq) + CO₂(g) + H₂O(l)

(ii) H₂S(aq) + Cl₂(g) ⟶ S(s) + Cl⁻(aq)

(iii) MnO₄ ⁻(aq) + C₂H₅OH(aq) ⟶ Mn²⁺(aq) + CO₂COOH(aq)

(iv) Bi(s) + NO₃ ⁻(aq) ⟶ Bi³⁺(aq) + NO₂(g)

(v) Cr₂O₇ ²⁻(aq) + C₂H₄O(aq) ⟶ Cr³⁺(aq) + C₂H₄O₂(aq)

(vi) MnO₄ ⁻(aq) + Br⁻(aq) ⟶ Mn²⁺(aq) + Br₂(aq)

(vii) Cu(aq) + NO₃ ⁻(aq) ⟶ Cu²⁺(aq) + NO₂(g)

(viii) H₂S(g) + Fe³⁺(aq) ⟶ Fe²⁺(aq) + S(s) + H⁺(aq)

(ix) I⁻(aq) + IO₃ ⁻(aq) + H⁺(aq) ⟶ I₂(aq) + H₂O(l)

(x) I⁻(aq) + O₂(g) + H₂O(l) ⟶ I₂(aq) + OH⁻(aq)

Shiksha Nation · Accepted Answer

(i) 2MnO4 −(aq) + 6H+(aq) + 5C2H2O4(aq) ⟶ 2Mn2+(aq) + 10CO2(g)+ 8H2O(l)(ii) H2S(g) + Cl2(g) ⟶ S(s) + 2Cl−(aq) + 2H+(aq)(iii) 4MnO4 −(aq) + 5C2H5OH(aq) + 12H+(aq) ⟶ 4Mn2+ + 5CH3COOH(aq) + 11H2O(l)(iv) Bi(s) + 3NO3 −(aq) + 6H+(aq) ⟶ Bi3+(aq) + 3NO2(g) + 3H2O(l)(v) Cr2O7 2−(aq) + 3C2H4O(aq) + 8H+(aq) ⟶ 2Cr3+(aq) + 3C2H4O2(aq) + 4H2O(l)(vi) 2MnO4 −(aq) + 10Br−(aq) + 16H+(aq) ⟶ 2Mn2+(aq) + 5Br2(aq) + 8H2O(l)(vii) Cu(s) + 2NO3 −(aq) + 4H+(aq) ⟶ Cu2+(aq) + 2NO2(g) + 2H2O(l)(viii) H2S(g) + 2Fe3+(aq) ⟶ 2Fe2+(aq) + S(s) + 2H+(aq)(ix) 5l−(aq) + IO3 −(aq) + 6H+(aq) ⟶ 3I2(aq) + 3H2O(l)(x) 4l−(aq) + O2(g) + 2H2O(l) ⟶ 2I2(aq) + 4OH−(aq)

Verified Answer