A weak acid HA has degree of dissociation x. Which option gives the correct expression of
( $pH pK_{a}$ ) ?

Question

A weak acid HA has degree of dissociation x. Which option gives the correct expression of ( pH pK_a) ?

Accepted Answer

Correct answer: D. (d) H ⇌ H^+ + A^- C - - C (1-x ) Cx Cx K_a= (H^+ ) (x )C (1-x ) (H^+ )=K_a (1-x )x log ⁡H^+= log ⁡K_a+ log ⁡ ( 1-xx ) - logH^+=- log ⁡K_a- log ⁡ 1-xx pH= pK_a- log ⁡ 1-xx pH- pK_a= log ⁡ x1-x

$A weak acid HA has degree of dissociation x. Which option gives the correct expression of (pH pK_{a}) ?$

Solution

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