Question

An acid HA ionises as $HA \rightleftharpoons H^+ + A^-$ The pH of 1.0 M solution is 5. Its dissociation constant would be :
(a) 5
(b) 5 x 10⁻⁸
(c) 1 x 10⁻⁵
(d) 1 x 10⁻¹⁰

Answer 1

(c) 1 x 10-5 is the answer