Question

Equal volums of solutions `pH` values `1,3,5,6` are mixed with each other . The pH of resultant solution is nearly
A. `1.3`
B. `2.7`
C. `1.6`
D. `3.6`

Answer 1

Correct Answer - C
`[H^(+)] = (10^(-1) v + 10^(-3)v + 10^(-5)v + 10^(-6))/(4v) = (10^(-1)v)/(4v)`
`= 0.25 xx 10^(-1)`
`= 2.5 xx 10^(-2)`
`P^(H) = -"log" 2.5 xx 10^(-2)`
`= 2 - "log" 2.5`
`P^(H) = 1.6`