Question 11. ElectrolysisComplete and balance the electrode reactionsa. Electrolysis of fused lead bromide 1. Dissociation of lead bromidePbBr2 ⇌ ............... + ............... [ions present Pb2+, Br1-] ]2. Reaction at cathode [inert-graphite]Pb2+ + ............... ⟶ ............... [product Lead metal]3. Reaction at anode [inert-graphite]Br1- - ............... ⟶ ...............Br + Br ⟶ ............... [product Bromine vapours]b. Electrolysis of acidified water 4. Dissociation of acidified waterH2SO4 ⇌ ............... + ............... H2O ⇌ ............... + ............... [ions H1+, SO42-, OH1-]5. Reaction at cathode [inert-platinum]H1+ + ............... ⟶ ............... H + H ⟶ ............... [product Hydrogen gas]6. Reaction at anode [inert-platinum]OH1- - ............... ⟶ ............... 4OH ⟶ ............... + ............... [product oxygen gas]c. Electrolysis of aq. copper sulphate [Active-copper electrode] 7. Dissociation of aq. copper sulphateCuSO4 ⇌ ............... + ............... [ions present — Cu2+, H1+, SO42-, OH1-]H2O ⇌ ............... + ...............8. Reaction at cathode [copper (or Pt. or C)]Cu2+ + ............... ⟶ ............... [product copper metal]9. Reaction at anode [active copper]Cu - ............... ⟶ ............... [product nil - Cu2+ ions][Inert-platinum electrode]Dissociation of aq. copper sulphateCuSO4 ⇌ ............... + ............... [ions present — Cu2+, H1+, SO42-, OH1-]H2O ⇌ ............... + ...............Reaction at cathode [Pt. or Carbon or Cu]Cu2+ + ............... ⟶ ............... [product copper metal]Reaction at anode [inert-Pt. or C]OH1- - ............... ⟶ ...............4OH ⟶ ............... + ............... [product oxygen gas]

Question

Question 11. ElectrolysisComplete and balance the electrode reactionsa. Electrolysis of fused lead bromide   1. Dissociation of lead bromidePbBr2 ⇌ ............... + ............... [ions present Pb2+, Br1-] ]2. Reaction at cathode [inert-graphite]Pb2+ + ............... ⟶ ............... [product Lead metal]3. Reaction at anode [inert-graphite]Br1- - ............... ⟶ ...............Br + Br ⟶ ............... [product Bromine vapours]b. Electrolysis of acidified water   4. Dissociation of acidified waterH2SO4 ⇌ ............... + ...............   H2O ⇌ ............... + ............... [ions H1+, SO42-, OH1-]5. Reaction at cathode [inert-platinum]H1+ + ............... ⟶ ...............   H + H ⟶ ............... [product Hydrogen gas]6. Reaction at anode [inert-platinum]OH1- - ............... ⟶ ...............   4OH ⟶ ............... + ............... [product oxygen gas]c. Electrolysis of aq. copper sulphate [Active-copper electrode] 7. Dissociation of aq. copper sulphateCuSO4 ⇌ ............... + ............... [ions present — Cu2+, H1+, SO42-, OH1-]H2O ⇌ ............... + ...............8. Reaction at cathode [copper (or Pt. or C)]Cu2+ + ............... ⟶ ............... [product copper metal]9. Reaction at anode [active copper]Cu - ............... ⟶ ............... [product nil - Cu2+ ions][Inert-platinum electrode]Dissociation of aq. copper sulphateCuSO4 ⇌ ............... + ............... [ions present — Cu2+, H1+, SO42-, OH1-]H2O ⇌ ............... + ...............Reaction at cathode [Pt. or Carbon or Cu]Cu2+ + ............... ⟶ ............... [product copper metal]Reaction at anode [inert-Pt. or C]OH1- - ............... ⟶ ...............4OH ⟶ ............... + ............... [product oxygen gas]

Accepted Answer

1. ElectrolysisComplete and balance the electrode reactionsa. Electrolysis of fused lead bromide   1. Dissociation of lead bromidePbBr2 ⇌ Pb2+ + 2Br1- [ions present Pb2+, Br1-] ]2. Reaction at cathode [inert-graphite]Pb2+ + 2e- ⟶ Pb [product lead metal]3. Reaction at anode [inert-graphite]Br1- - 1e- ⟶ BrBr + Br ⟶ Br2 [product Bromine vapours]b. Electrolysis of acidified water   4. Dissociation of acidified waterH2SO4 ⇌ 2H1+ + SO42-   H2O ⇌ H1+ + OH1- [ions H1+, SO42-, OH1-]5. Reaction at cathode [inert-platinum]H1+ + 1e- ⟶ H x 4   2H + 2H ⟶ 2H2 [product Hydrogen gas]6. Reaction at anode [inert-platinum]OH1- - 1e- ⟶ OH x 4   4OH ⟶ 2H2O + O2 [product oxygen gas]c. Electrolysis of aq. copper sulphate [Active-copper electrode]7. Dissociation of aq. copper sulphateCuSO4 ⇌ Cu2+ + SO42- [ions present — Cu2+, H1+, SO42-, OH1-]H2O ⇌ H1+ + OH1-8. Reaction at cathode [copper (or Pt. or C)]Cu2+ + 2e- ⟶ Cu [product copper metal]9. Reaction at anode [active copper]Cu - 2e- ⟶ Cu2+ [product nil - Cu2+ ions][Inert-platinum electrode]Dissociation of aq. copper sulphateCuSO4 ⇌ Cu2+ + SO42- [ions present — Cu2+, H1+, SO42-, OH1-]H2O ⇌ H1+ + OH1-Reaction at cathode [Pt. or C or Cu)]Cu2+ + 2e- ⟶ Cu [product copper metal]Reaction at anode [inert-pt. or C]OH1- - 1e- ⟶ OH x 44OH ⟶ 2H2O + O2 [product oxygen gas]

1. Electrolysis	Complete and balance the electrode reactions
a. Electrolysis of fused lead bromide
1. Dissociation of lead bromide	PbBr₂ ⇌ ............... + ............... [ions present Pb²⁺, Br^1-] ]
2. Reaction at cathode [inert-graphite]	Pb²⁺ + ............... ⟶ ............... [product Lead metal]
3. Reaction at anode [inert-graphite]	Br^1- - ............... ⟶ ............... Br + Br ⟶ ............... [product Bromine vapours]
b. Electrolysis of acidified water
4. Dissociation of acidified water	H₂SO₄ ⇌ ............... + ...............
	H₂O ⇌ ............... + ............... [ions H¹⁺, SO₄^2-, OH^1-]
5. Reaction at cathode [inert-platinum]	H¹⁺ + ............... ⟶ ...............
	H + H ⟶ ............... [product Hydrogen gas]
6. Reaction at anode [inert-platinum]	OH^1- - ............... ⟶ ...............
	4OH ⟶ ............... + ............... [product oxygen gas]
c. Electrolysis of aq. copper sulphate [Active-copper electrode]
7. Dissociation of aq. copper sulphate	CuSO₄ ⇌ ............... + ............... [ions present — Cu²⁺, H¹⁺, SO₄^2-, OH^1-] H₂O ⇌ ............... + ...............
8. Reaction at cathode [copper (or Pt. or C)]	Cu²⁺ + ............... ⟶ ............... [product copper metal]
9. Reaction at anode [active copper]	Cu - ............... ⟶ ............... [product nil - Cu²⁺ ions]
[Inert-platinum electrode] Dissociation of aq. copper sulphate	CuSO₄ ⇌ ............... + ............... [ions present — Cu²⁺, H¹⁺, SO₄^2-, OH^1-] H₂O ⇌ ............... + ...............
Reaction at cathode [Pt. or Carbon or Cu]	Cu²⁺ + ............... ⟶ ............... [product copper metal]
Reaction at anode [inert-Pt. or C]	OH^1- - ............... ⟶ ............... 4OH ⟶ ............... + ............... [product oxygen gas]

1. Electrolysis	Complete and balance the electrode reactions
a. Electrolysis of fused lead bromide
1. Dissociation of lead bromide	PbBr₂ ⇌ *Pb²⁺* + *2Br^1-* [ions present Pb²⁺, Br^1-] ]
2. Reaction at cathode [inert-graphite]	Pb²⁺ + *2e^-* ⟶ Pb [product lead metal]
3. Reaction at anode [inert-graphite]	Br^1- - *1e^-* ⟶ Br Br + Br ⟶ *Br₂* [product Bromine vapours]
b. Electrolysis of acidified water
4. Dissociation of acidified water	H₂SO₄ ⇌ *2H¹⁺* + *SO₄^2-*
	H₂O ⇌ *H¹⁺* + *OH^1-* [ions H¹⁺, SO₄^2-, OH^1-]
5. Reaction at cathode [inert-platinum]	H¹⁺ + *1e^-* ⟶ *H x 4*
	2H + 2H ⟶ *2H₂* [product Hydrogen gas]
6. Reaction at anode [inert-platinum]	OH^1- - *1e^-* ⟶ *OH x 4*
	4OH ⟶ *2H₂O* + O₂ [product oxygen gas]
c. Electrolysis of aq. copper sulphate [Active-copper electrode]
7. Dissociation of aq. copper sulphate	CuSO₄ ⇌ *Cu²⁺* + *SO₄^2-* [ions present — Cu²⁺, H¹⁺, SO₄^2-, OH^1-] H₂O ⇌ *H¹⁺* + *OH^1-*
8. Reaction at cathode [copper (or Pt. or C)]	Cu²⁺ + *2e^-* ⟶ Cu [product copper metal]
9. Reaction at anode [active copper]	Cu - *2e^-* ⟶ *Cu²⁺* [product nil - Cu²⁺ ions]
[Inert-platinum electrode] Dissociation of aq. copper sulphate	CuSO₄ ⇌ *Cu²⁺* + *SO₄^2-* [ions present — Cu²⁺, H¹⁺, SO₄^2-, OH^1-] H₂O ⇌ *H¹⁺* + *OH^1-*
Reaction at cathode [Pt. or C or Cu)]	Cu²⁺ + *2e^-* ⟶ Cu [product copper metal]
Reaction at anode [inert-pt. or C]	OH^1- - *1e^-* ⟶ *OH x 4* 4OH ⟶ *2H₂O* + O₂ [product oxygen gas]

Electrolysis — Question 1

Question 1