Question

How many times a 0.1 M strong monobasic solution should be diluted so that the pH of the resulting solution is tripled ?
A. 50
B. 10
C. 25
D. 100

Answer 1

Correct Answer - D
`pH =- log [H]`
pH of 0..1 M monobasic acidic solution =1
pH of resulting solution after dilution =3
`[H^(+)] =10^(-3) M " or " 0.001M`
The solution must be diluted 100 times.