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What mass of copper in gram would be deposited by a current of 1.00ampere passing...

Chemistry
NECO 2009

What mass of copper in gram would be deposited by a current of 1.00ampere passing for 965 seconds through copper(II) tertraoxosulphate (VI) solution? [Cu 63.5; If = 96500c]

  • A. 0.32
  • B. 0.64
  • C. 3.18
  • D. 6.35
  • E. 9.65
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Correct Answer: Option A
Explanation

Recall that two faradays ( 2 X 96500 ) will be required to discharge 1 mole of a divalent ion like Cu.

2 X 96500 will deposit 63.5g of Cu

And 965C wiil deposit  x-grams

CROSS MULTIPLY

(965 X 63.5) ÷ ( 2 X 96500)

= 0.3175

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