1.

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,

Answer»

 INCREASES by one
decreases by one
decreases TEN FOLD
 increases ten fold.

SOLUTION :`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.


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