0.324 g of copper was dissolved in nitric acid and the copper nitrate so produced was burnt till all copper nitrate converted to 0.406 g of copper oxide. Calculate the equivalent weight of copper.

0.324 g of copper was dissolved in nitric acid and the copper nitrate

1.	0.324 g of copper was dissolved in nitric acid and the copper nitrate so produced was burnt till all copper nitrate converted to 0.406 g of copper oxide. Calculate the equivalent weight of copper.
Answer» Solution :`UNDERSET(0.324 "g")(CU+ HNO_3) to "copper nitrate" tounderset(0.406 "g") "copper oxide"` Suppose the EQUIVALENT weight of copper `(Cu)` is `E_(Cu)`. Equivalent of Cu `=` equivalent of copper oxide `(0.324)/(E_(Cu) )= (0.406)/("eq. wt. of copper oxide")` `(0.324)/( E_(Cu) ) = ( 0.406)/("eq. wt. of Cu + eq. wt. of O")= ( 0.406)/( E_(Cu ) +8)` Hence the equivalent weight of Cu is `31.60`.