[" Q."16" If "A=10" for a weak acid,then "pK" ,for "],[" its conjugate base would be "]

If K_(a)=10^(-5) for a weak acid, then pK_(b) for its conjugate base would be

If pK_(a) of a weak acid is 5, then pK_(b) of the conjugate base will

If K_a for a weak acid is 10^-5 . pK_b value of its conjugate base is:

Define pK_(a) for weak acids.

At 25^(@)C,pK_a for weak acid, HA=x and pK_b for A^- the conjugate base of HA=y. find the value of (x+y) at this temperature.

K_(a) for a weak monobasic acid is 1.0xx10^(-6) . The pK_(b) of its conjugate base base is

Solution of a weak acid and its anion (that is,its conjugate base) or of a base and its common cation are buffered. When we add a small amount of acid or base to any one of the, the pH of solution change very little. pH of buffer solution can be computed as for acidic buffer : pH=pK_(a)+ log.(["Conjugate base"])/(["Acid"]) for basic buffer : pOH=pK_(b)+log.(["Conjugate acid"])/([Base]) It is generly accepted that a has useful buffer cpacity (pH change resisting power) provided that the value of [salt or conjugate base] /[acid] for acidic buffer lies within the range of 1 : 10 to 1. Buffer capacity is maximum when [conjugate base] = [acid] Useful correct statement :

Assertion (A ) : Acetic acid is a weak acid Reason (R ) : Its conjugate base is weak