Calculate the indicated value based on the information given: a. what is the kb of the lactate ion? the ka of lactic acid is 1.4 3 1024 . b. what is the kb of the conjugate base of pyruvic acid? the ka of pyruvic acid is 2.8 3 1023 .

Answer :

(a) The value of of the lactate ion is,

(b) The value of of the conjugate base of pyruvic acid is,

Explanation :

Solution for (a) :

As we are given :

As we know that,

where,

= dissociation constant of an acid =

= dissociation constant of a base = ?

= dissociation constant of water =

Now put all the given values in the above expression, we get the dissociation constant of a base (lactate ion).

Therefore, the value of of the lactate ion is,

Solution for (b) :

As we are given :

As we know that,

where,

= dissociation constant of an acid =

= dissociation constant of a base = ?

= dissociation constant of water =

Now put all the given values in the above expression, we get the dissociation constant of a base (conjugate base of pyruvic acid).

Therefore, the value of of the conjugate base of pyruvic acid is,