Extraction of Metals - Result Question 87
####90. Give balanced equations for the extraction of “Silver from silver glance by cyanide process.”
$(1988,1 M)$
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Solution:
- $\quad Ag _2 S+2 NaCN \longrightarrow 2 AgCN+Na _2 S$
$$ AgCN+NaCN \longrightarrow Na\left[Ag(CN) _2\right] $$
$$ 2 Na\left[Ag(CN) _2\right]+Zn \longrightarrow Na _2\left[Zn(CN) _4\right]+2 Ag $$
