Chemistry · Electrolytic and metallic conduction, conductance in electrolytic solutions, molar conductivities and their variation with concentration, Kohlrausch's law and its applications
3 faraday of electricity are passed through molten aqueous solution of and molte
3 faraday of electricity are passed through molten \( A l_{2} O_{3}, \) aqueous solution of \( C u S O_{4} \) and molten NaCl taken in three different electrolytic cells. The amount of \( \mathrm{Al}, \mathrm{Cu}, \) and \( \mathrm{Na} \) deposited at the cathodes will be in the ratio of
- A. 1 mole : 2 mole : 3 mole
- B. 3 mole:2 mole:1 mole
- C. 1 mole : 1.5 mole : 3 mole
- D. 1.5 mole : 2 mole : 3 mole
Step-by-step solution
For Al (Al3+ + 3e- → Al), 3 F deposit 1 mol Al. For Cu (Cu2+ + 2e- → Cu), 3 F deposit 1.5 mol Cu. For Na (Na+ + e- → Na), 3 F deposit 3 mol Na. Ratio = 1:1.5:3.
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