Question

.
2.490 g of CuO was obtained by oxidising 1.986 g of copper by nitric acid. 0.335 g of Cu was precipitated by 0.349 g of
Zn from CuSO4 solution. What are the equivalent weights of Cu and Zn?

Answer 1

Answer:Equivalent mass of Cu=

Mass of oxygen in oxide

Mass of Metal×8

​

                                         Given

                                         =

(2.47−1.986)

1.986

​

×8=32.82                               M

Cuo

​

=2.47g

                                                                                                                               M

Cu

​

=1.986g

Now,  

Mass of Cu

Mass of Zn

​

=

Eq. mass of Cu

Eq. mass of Zn

​

0.335

0.346

​

=

32.82

E

Zn

​

​

∴   Eq. mass of Zn=33.89

Explanation: