2.1 g of metal carbonate on thermal decomposition gave 1 g of metal oxide as residue. Determine the equivalent weight of metal.

Explanation

Let the equivalent weight of metal =x
Equivalent weight of metal oxide =x+8
Equivalent weight of metal carbonate =x+30
When weight ratio is related to equivalent weight ratio for two substances `(W_(i))/(W_(2))=(E_(1))/(E_(2)), (2.1)/(1)=(x+30)/(x+8)`
Solving , x = 12
Equivalent weight of metal = 12