3.0 g of metal chloride gave 2.0 g of metal. Calculate the equivalent weight of the metal.

Explanation

Let the equivalent weight of metal (M) be E.
`Ew(Cl)=35.5g`.
Weight of `Cl=3.0-2.0=1.0g`
" Eq of "mwetal `=" Eq of "`Cl ltBrgt `("Weight of M")/(Ew(M))=(Weight of Cl)/(Ew(Cl))`
`(2.0)/(E)=(1.0)/(35.5)`
`E=71.0g`
General formula: If x g of metal chloride gave y g of metal, the Ew of metal is
Ew of `M`
`=("weight of M")/("weight of M chloride"-"weight of M")xxEw(Cl)`
`=(x xx35.5)/(x-y)=(2.0xx35.5)/((3.0-2.0))=71.0g`