1.

A 100 mL 0.1 M solution of ammonium acetate is diluted by adding 100 mL of water. The pH of the resulting solution will be (PK_a of acetic acid is nearly equal to pK_a of NH_4 OH)

Answer»

`4.9`
`5.0`
`7.0`
`10.0`

SOLUTION :HYDROLYSISOF a saltof weakacidandweakandbase :
`PH =7 +1/2(pK_a -pK_b) =7`
`as pk_a ~~ pJK_b`


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