Q. The first and second dissociation constants of an acid $H_{2}A\ are\ 1.0 \times 10^{- 5}\ and\ 5.0 \times 10^{- 10}$ respectively. The overall dissociation constant of the acid will be
A) $5.0 \times 10^{- 5}$
B) $5.0 \times 10^{15}$
C) $5.0 \times 10^{- 15}$
D) $0.2 \times 10^{5}$
Explanation
(c)
$K = k_{1} \times k_{2}$
$= 1.8 \times 10^{- 5} \times 5.0 \times 10^{- 10}$
$= 5 \times 10^{- 15}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.