Post-UTME Chemistry 2011 Objective — Question 8
Question 8 of 11 from the Post-UTME Screening (Post-UTME) Chemistry 2011 Objective paper, with the correct answer and a full explanation.
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Calculate the quantity of electricity required to deposit 64.0g of copper from copper (II) chloride solution [Cu=64, 1F=96500C]
- A. 3.09x10^5C
- B. 1.93x10^5CCorrect
- C. 9.65x10^4C
- D. 6.18x10^4C
Explanation
Moles Cu = 64/64=1mol. Cu2+ +2e- -> Cu needs 2 moles electrons = 2F = 2x96500=193000C = 1.93x10^5C.
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