問題詳情

13. A 0.100 g sample of an alloy of copper and silver is dissolved in nitric acid to give a solution of

and

ions. Thismixture is electrolyzed to redeposit all the metal ions as the elemental metals, requiring a current of 0.150 A for 1800 s.What's the mass percent of copper in the alloy? (Cu, M=63.5 g/mole, Ag, MW:107.9 g/mole)
(A) 84.2%
(B) 20.0%
(C) 58.3%
(D) 70.6%
(E) 77.2%

參考答案

答案：A
難度：計算中-1
書單：沒有書單，新增