Question 2B2. B Electrorefining of copperComplete and balance the electrode reactions16. Dissociation of aq. copper sulphateCuSO4 ⇌ ............... + ............... H2O ⇌ ............... + ...............17. Reaction at cathode [pure thin sheet of Cu]Cu2+ + ............... ⟶ ............... [Cu deposited on thin sheet]18. Reaction at anode [impure block of active Cu]Cu - ............... ⟶ ............... [product nil - Cu2+ ions]Electrometallurgy of sodium 19. Dissociation of sodium chloride fusedNaCl ⇌ ............... + ...............20. Reaction at cathode [inert - electrode]Na1+ + ............... ⟶ ............... [product Na metal]21. Reaction at anode [inert - electrode]Cl1- - ............... ⟶ ............... Cl + Cl ⟶ ............... [product Cl2 gas]Electrometallurgy of aluminium 22. Dissociation of pure aluminaAl2O3 ⇌ ............... + ...............23. Reaction at cathode [inert - electrode]Al3+ + ............... ⟶ ............... [product Al metal]24. Reaction at anode [inert - electrode]O2- - ............... ⟶ ............... ⟶ 3O2 [product O2 gas]

Question

Question 2B2. B Electrorefining of copperComplete and balance the electrode reactions16. Dissociation of aq. copper sulphateCuSO4 ⇌ ............... + ...............   H2O ⇌ ............... + ...............17. Reaction at cathode [pure thin sheet of Cu]Cu2+ + ............... ⟶ ............... [Cu deposited on thin sheet]18. Reaction at anode [impure block of active Cu]Cu - ............... ⟶ ............... [product nil - Cu2+ ions]Electrometallurgy of sodium   19. Dissociation of sodium chloride fusedNaCl ⇌ ............... + ...............20. Reaction at cathode [inert - electrode]Na1+ + ............... ⟶ ............... [product Na metal]21. Reaction at anode [inert - electrode]Cl1- - ............... ⟶ ...............   Cl + Cl ⟶ ............... [product Cl2 gas]Electrometallurgy of aluminium   22. Dissociation of pure aluminaAl2O3 ⇌ ............... + ...............23. Reaction at cathode [inert - electrode]Al3+ + ............... ⟶ ............... [product Al metal]24. Reaction at anode [inert - electrode]O2- - ............... ⟶ ............... ⟶ 3O2 [product O2 gas]

Accepted Answer

2. B Electrorefining of copperComplete and balance the electrode reactions16. Dissociation of aq. copper sulphateCuSO4 ⇌ Cu2+ + SO42-   H2O ⇌ H1+ + OH1-17. Reaction at cathode [pure thin sheet of Cu]Cu2+ + 2e- ⟶ Cu [Cu deposited on thin sheet]18. Reaction at anode [impure block of active Cu]Cu - 2e- ⟶ Cu2+ [product nil - Cu2+ ions]Electrometallurgy of sodium   19. Dissociation of sodium chloride fusedNaCl ⇌ Na1+ + Cl1-20. Reaction at cathode [inert - electrode]Na1+ + 1e- ⟶ Na [product Na metal]21. Reaction at anode [inert - electrode]Cl1- - 1e- ⟶ Cl   Cl + Cl ⟶ Cl2 [product Cl2 gas]Electrometallurgy of aluminium   22. Dissociation of pure aluminaAl2O3 ⇌ 2Al3+ + 3O2-23. Reaction at cathode [inert - electrode]2Al3+ + 6e- ⟶ 2Al [product AL metal]24. Reaction at anode [inert - electrode]3O2- - 6e- ⟶ 3[O] ⟶ 3O2 [product O2 gas]

2. B Electrorefining of copper	Complete and balance the electrode reactions
16. Dissociation of aq. copper sulphate	CuSO₄ ⇌ *Cu²⁺* + *SO₄^2-*
	H₂O ⇌ *H¹⁺* + *OH^1-*
17. Reaction at cathode [pure thin sheet of Cu]	Cu²⁺ + *2e^-* ⟶ Cu [Cu deposited on thin sheet]
18. Reaction at anode [impure block of active Cu]	Cu - *2e^-* ⟶ *Cu²⁺* [product nil - Cu²⁺ ions]
Electrometallurgy of sodium
19. Dissociation of sodium chloride fused	NaCl ⇌ *Na¹⁺* + *Cl^1-*
20. Reaction at cathode [inert - electrode]	Na¹⁺ + *1e^-* ⟶ Na [product Na metal]
21. Reaction at anode [inert - electrode]	Cl^1- - *1e^-* ⟶ Cl
	Cl + Cl ⟶ *Cl₂* [product Cl₂ gas]
Electrometallurgy of aluminium
22. Dissociation of pure alumina	Al₂O₃ ⇌ *2Al³⁺* + *3O^2-*
23. Reaction at cathode [inert - electrode]	2Al³⁺ + *6e^-* ⟶ *2Al* [product AL metal]
24. Reaction at anode [inert - electrode]	3O^2- - *6e^-* ⟶ *3[O]* ⟶ 3O₂ [product O₂ gas]

2. B Electrorefining of copper	Complete and balance the electrode reactions
16. Dissociation of aq. copper sulphate	CuSO₄ ⇌ ............... + ...............
	H₂O ⇌ ............... + ...............
17. Reaction at cathode [pure thin sheet of Cu]	Cu²⁺ + ............... ⟶ ............... [Cu deposited on thin sheet]
18. Reaction at anode [impure block of active Cu]	Cu - ............... ⟶ ............... [product nil - Cu²⁺ ions]
Electrometallurgy of sodium
19. Dissociation of sodium chloride fused	NaCl ⇌ ............... + ...............
20. Reaction at cathode [inert - electrode]	Na¹⁺ + ............... ⟶ ............... [product Na metal]
21. Reaction at anode [inert - electrode]	Cl^1- - ............... ⟶ ...............
	Cl + Cl ⟶ ............... [product Cl₂ gas]
Electrometallurgy of aluminium
22. Dissociation of pure alumina	Al₂O₃ ⇌ ............... + ...............
23. Reaction at cathode [inert - electrode]	Al³⁺ + ............... ⟶ ............... [product Al metal]
24. Reaction at anode [inert - electrode]	O^2- - ............... ⟶ ............... ⟶ 3O₂ [product O₂ gas]

Electrolysis — Question 3

Question 2B