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State the electrode reaction at the anode during electrolysis of:

(a) very dilute sulphuric acid,

(b) Aqueous copper sulphate solution

(c) sodium chloride solution,

(d) Fused lead bromide,

(e) magnesium chloride (molten).

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1 Answers

(a) Reaction at anode during the electrolysis of very dilute sulphuric acid:

OH- ⟶ OH + e-

4OH ⟶ 2H2O + O2

(b) Reaction at anode during the electrolysis of aqueous copper sulphate solution

4OH- ⟶ 4OH + 4e-

4OH ⟶ 2H2O +O2

(c) Reaction at anode during the electrolysis of sodium chloride solution

2Cl- ⟶ Cl2 + 2e-

(d) Reaction at anode during the electrolysis of fused lead bromide

Br- - e- ⟶ Br

Br + Br ⟶ Br2

(e) Reaction at anode during the electrolysis of magnesium chloride (molten)

2Cl- ⟶ Cl2 + 2e-

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