A certain sample of cuprous sulphide is found to have composition Cu1.8S, because of incorporation of cu2+ ions in the lattice. What is the mole % of cu2+ in total copper content in this crystal?
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a
99.8%
b
11.11%`
c
88.88%
d
None of these
answer is B.
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Detailed Solution
Two Cu+ replaced by one Cu2+Total loss of Cu = 0.2 moleSo, mole of Cu2+ present in Cu1.8S = 0.2â´ % of Cu 2+ in total copper content=0.21.8Ã100=11.11