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4 g of copper was dissolved in concentrated nitric aci(d) The copper nitrate solution on strong heating gave $5 g$ of its oxide. The equivalent weight of copper is
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32
Copper on reacting with conc. HNO ${ }_{3}$ gives copper nitrate.
On strongly heating with copper nitrate, copper oxide is obtained.
$\therefore$ Equivalent weight of $\mathrm{Cu}$
$=$ Weight of copper $\times$ Equivalent weight of oxygen $=4 \times 8=32$
On strongly heating with copper nitrate, copper oxide is obtained.
$\therefore$ Equivalent weight of $\mathrm{Cu}$
$=$ Weight of copper $\times$ Equivalent weight of oxygen $=4 \times 8=32$
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