Question

A weak monobasic acid is 1% ionized in 0.1 M solution at `25^(@)`C. The percentage ionization in its 0.025 M solution is
A. 1
B. 2
C. 3
D. 4

Answer 1

Correct Answer - B
`HAhArrH^(+)+A^(-)`,
`K=Calpha^(2)=0.1xx((1)/(100))^(2)=10^(-5)`
When `C=0.025,alpha=sqrt((K)/(C))=sqrt((10^(-5))/(0*025))=0*02`
`:.%" ionization "=2%`.