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Ka values for Ha,HB and HD are 10 ^(-5) ...

`K_a` values for Ha,HB and HD are `10 ^(-5) ,10 ^(-7) and 10 ^(-9) ` respectively . Whch of the following will be correct for decimolar aqueous solution of NaA, NaB and NaD at `25^(@) ` C ?

A

`(pH)_(N_BA) lt (pH) _(NaB) `

B

`(pH) _(NaD) lt(pH) _(NaB) `

C

` (pH)_(NaA) lt (pH) _(NaD) `

D

`(pH) _(NaB) =7`

Text Solution

Verified by Experts

The correct Answer is:
A, C
` pH= 7+ ( (pKa+log c)/( 2)) , pH uparrow if pKa uparrow `
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