CBSE Class 12 · 2009 · All India · d and f Block ElementsShort Answer

Complete the following chemical equations:
i) MnO₄⁻(aq) + C₂O₄²⁻(aq) + H⁺(aq) →
ii) Cr₂O₇²⁻(aq) + Fe²⁺(aq) + H⁺(aq) →

Answer: (i) 2MnO₄⁻+5C₂O₄²⁻+16H⁺→2Mn²⁺+10CO₂+8H₂O. (ii) Cr₂O₇²⁻+6Fe²⁺+14H⁺→2Cr³⁺+6Fe³⁺+7H₂O.

Solution

(i)

2Mn O_{4}^{-} + 5 C_{2} O_{4}^{2 -} + 16 H^{+} \to 2M n^{2 +} + 10C O_{2} ↑ + 8 H_{2} O

(ii)

C r_{2} O_{7}^{2 -} + 6F e^{2 +} + 14 H^{+} \to 2C r^{3 +} + 6F e^{3 +} + 7 H_{2} O

CBSE Class 12 Board · 2009 · All India · Subjective