Question

A current of dry hydrogen was passed over 2.219 g of copper oxide and the metal obtained on
reduction weighed 1.7685 g. Calculate the equivalent weight of copper? with method

Answer 1

Answer:

When hot metal oxide is treated with hydrogen, 1.8 g water if formed. <br> 18 g

contains 16 g oxygen. <br> (b) Equivalent mass may be defined as weight of the metal that combines with 8 parts of oxygen to from its oxide. <br> Mass of metal in its oxide = 8.08-1.6 <br> =6.48 g <br>

1.6 g oxygen combines with 6.48 g of metal <br>

oxygen will combine with

g of metal <br> =32.4 g <br> Thus, equivalent mass of metal =32.4