0.3 g of an acid is neutralized by `40 cm^(3)` of 0.125 N NaOH. Equivalent mass of the acid is

Options

A. `60`
B. `45`
C. `30`
D. `63`

Answer

A

Explanation

`40cm^(3)` of 0.125 N NaOH neutralize acid = 0.3 g
`1000 cm^(3)` of 1 N NaOH will neutralize acid
`= (0.3)/(40)xx(1000)/(0.125)g = 60 g`
`1000cm^(3)` of 1 N NaOH contains one gram equivalent of the acid. Hence equivalent weight of acid=60