Question
How is copper extracted from its sulphide ore?
✓
Answer
Copper is found as cuprous sulphide $\left( Cu _2 S \right)$ in nature. When $Cu _2 S$ is heated in air, copper is obtained.
$
\begin{aligned}
& 2 Cu _2 S _{( s )}+3 O _{2( g )} \stackrel{\text { heat }}{\longrightarrow} 2 Cu _2 O _{( s )}+2 SO _{2( g )} \\
& \text { Cuprous sulphide Cuprous oxide } \\
& 2 Cu _2 O + Cu _2 S \stackrel{\text { heat }}{\longrightarrow} 6 Cu _{( s )}+ SO _{2( g )}^{\text {Mahar }} \\
&
\end{aligned}
$
$
\begin{aligned}
& 2 Cu _2 S _{( s )}+3 O _{2( g )} \stackrel{\text { heat }}{\longrightarrow} 2 Cu _2 O _{( s )}+2 SO _{2( g )} \\
& \text { Cuprous sulphide Cuprous oxide } \\
& 2 Cu _2 O + Cu _2 S \stackrel{\text { heat }}{\longrightarrow} 6 Cu _{( s )}+ SO _{2( g )}^{\text {Mahar }} \\
&
\end{aligned}
$
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