Question

The equivalent weight of potash alum
`(K_(2)SO_(4).Al_(2)(SO_(4))_(3).24H_(2)O)` is
A. `M`
B. `(M)/(2)`
C. `(M)/(6)`
D. `(M)/(8)`

Answer 1

Correct Answer - B
Potash alum is a double salt.
`Total+"ve charge"=Total-"ve charge"`
`K_(2)^(2+)SO_(4)^(2-).Al_(2)^(+6)(SO_(4))_(3)^(-2xx3).24H_(2)O`
`Total+"ve charge"=8`
`Total-"ve-charge"=8`
`:. Ew=(M)/(8)`