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Question
\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]
The number of CN− ions involved in the balanced equation is ______.
Options
4
8
12
16
MCQ
Fill in the Blanks
Solution
\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]
The number of CN− ions involved in the balanced equation is 8.
Explanation:
\[\ce{4Au + 8CN^- + 2H2O + O2 -> 4[Au(CN)2]^- + 4OH^-}\]
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