The pK_(a) of an acid HA is 4.77 and pK_(b) of a base BOH is 4.75 . The pH of 0.1 M aqueoussolutionof the salt AB is

The pK_(a) of an acid HA is 4.77 and pK_(b) of a base BOH is 4.75 . Th

1.	The pK_(a) of an acid HA is 4.77 and pK_(b) of a base BOH is 4.75 . The pH of 0.1 M aqueoussolutionof the salt AB is
Answer» 7.02 7.01 6.99 `7.00` SOLUTION :AB is a salt of weak acid and weak base. Hence, `pH = 7 + (1)/(2) (pK_(a)-pK_(b))` `=7 + (1)/(2) (4.77-4.75)= 7.01`