First slide

Salt hydrolysis :

Question

From separate solutions of sodium salts, NaW, NaX, NaY and NaZ have pH 7.0, 9.0 10.0 and 11.0 respectively. When each solution was 0.1 M, the strongest acid is

Easy

A

HW
B

HX
C

HY
D

HZ

Solution

The salt hydrolysis in each case occurs except NaW because its pH = 7. Thus HW is strongest acid.

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