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4.3 Exercise 8

Avg difficulty 2.5

Silver is often extracted from ores such as K[Ag(CN)2] and then recovered by the reaction
2K[Ag(CN)2](aq)+Zn(s)⟶2Ag(s)+Zn(CN)2(aq)+2KCN(aq)2 \text{K} \left[\text{Ag} \left(\text{CN}\right)_{2}\right] \left(a q\right) + \text{Zn} \left(s\right) \rightarrow \text{2Ag} \left(s\right) + \text{Zn} \left(\text{CN}\right)_{2} \left(a q\right) + 2 \text{KCN} \left(a q\right)

(a) How many molecules of Zn(CN)2 are produced by the reaction of 35.27 g of K[Ag(CN)2]?

(b) What mass of Zn(CN)2 is produced?

OpenStax Chemistry 2e, 4.3 Reaction Stoichiometry, exercise 8

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Adapted from General Chemistry © 2019 Rice University. Licensed under CC BY 4.0. Sources: Chemistry 2e, Chemistry: Atoms First 2e. Imported at revision 32c7196.