In a buffer solution of weak acid and its salt, when the concentration of salt to acid is increased by 10 times, the pH of the solution,

Options

A. increases by one
B. decreases by one
C. decreases ten fold
D. increases ten fold.

Answer

A

Explanation

`pH_(1)=(1)/(log[H^(+)]^(+))`,`pH_(2)=(1)/(log[10H^(+)])`
`(pH_(1))/(pH_(2))=(1//log[H^(+)])/(1//log[10H^(+)])=(log10+log[H^(+)])/(log[H^(+)])`
=`(1+log[H^(+)])/(log[H^(+)])`
pH of the solution increases by one factor.