0.59 g of the silver salt of an organic acid (molar mass 210) on ignition gave 0.36 g of pure silver. The basicity of the acid is

Options

A. 3
B. 2
C. 1
D. 4

Answer

A

Explanation

Moles of silver ` = (0.36)/(108) = 3.3 xx 10^(-3)`
Mass of organic acid ` = 0.59 - 0.36 g rArr 0.23 g`
Mole of organic acid ` = (0.23)/(210) = 1.09 xx 10^(-3)`
So, moles of silver are 3 times the moles of acid .
If .O. is the organic acid ion then
`O- Ag_(3) overset(H^(+)) to O- H_(3) + 3Ag`
So, the basicity of the acid is 3.