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 ?

K_a values for Ha,HB and HD are 10 ^(-5),10 ^(-7)and 10 ^(-9)respectiv

1.	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 ?
Answer» `(pH)_(N_BA) lt (pH) _(NaB) ` `(pH) _(NAD) lt(pH) _(NaB) ` ` (pH)_(NAA) lt (pH) _(NaD) ` `(pH) _(NaB) =7` SOLUTION :` pH= 7+ ( (pKa+log c)/( 2)) , pH uparrow if pKa uparrow `