Q. pH of a 0.0001 M HCl solution is
A) 4.0
B) 2.0
C) 6.0
D) 7.0
Explanation
(a)
$pH = - \log{\lbrack H^{+}\rbrack}$
$\left\lbrack H^{+} \right\rbrack = 0.0001 = 1 \times 10^{- 4}$
$pH = \ - \log{\ \left\lbrack 1 \times 10^{- 4} \right\rbrack = 4}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.