Chemistry - Stoichiometry Question with Solution | TestHub
ChemistryStoichiometryProblems Based on Mixtures, Percentage PurityHard2 minQB
ChemistryHardnumerical
A quantity of 5.4 g of an alloy of copper and silver was dissolved in moderately conc. and excess of was added to this solution when 5.74 g of a dry precipitate is formed. Calculate the percentage of copper in the alloy. (Cu = 63.5, Ag = 108)
Answer:
20.00
Solution:
The precipitate is only. Moles = 5.74/143.5 = 0.04 mol = moles Ag. Mass Ag = = 4.32 g. Mass Cu = 5.4-4.32 = 1.08 g. %Cu = 1.08/5.4×100 = 20%. Ans 0020.
Stream:JEESubject:ChemistryTopic:StoichiometrySubtopic:Problems Based on Mixtures, Percentage Purity
⏱ 2mℹ️ Source: QB
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