Copper sulphate solution is electolysed using platinum electrodes A. current of 0.193 amperes is passed for 2hrs. How many grams of copper are deposited? (cu = 63.5, F = 96500 coulombs)

  • A 0.457g
  • B 0.500g
  • C 0.882g
  • D 0.914g
  • E 1.00g
jamb 1985chemistry

The correct answer is A. 0.457g

Time = 2hrs 120mm = 120 x 60secs

current = 0.193amps

Quantity of electricity = 120 x 0.193

= 60 x 23.16

96,500 deposits 63.5 gms of Cu

60 x 23.2 will deposit \(\frac{63.5 \times 60 \times 23.2}{96500}\)

= 0.457

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