5. For many years the recovery of gold, that is, the separation of gold from other materials, involved the use of potassium cyanide: 4Au + 8KCN + O2 + H2o → 4KAU(CN)2 + 4KOH What is the maximum amount of KCN in moles needed to extract 29.0 g (about an ounce) of gold?

5. For many years the recovery of gold, that is, the separation of gold from other materials, involved the use of potassium cyanide: 4Au + 8KCN + O2 + H2o → 4KAU(CN)2 + 4KOH What is the maximum amount of KCN in moles needed to extract 29.0 g (about an ounce) of gold?

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter4: Stoichiometry Of Chemical Reactions

Section: Chapter Questions

Problem 69E: Outline the steps needed to solve the following problem, then do the calculations. Ether, (C2H5)2O,...

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Question

5. please show solution or explain if needed

5. For many years the recovery of gold, that is, the separation of gold from other
materials, involved the use of potassium cyanide:
4Au + 8KCN + 02 + H20 - 4KAU(CN)2 + 4KOH
What is the maximum amount of KCN in moles needed to extract 29.0 g (about an
ounce) of gold?

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