Equilibrium Question 864
Equal volumes of two HCl solutions of $ pH=3 $ and $ pH=5 $ were mixed. What is the pH of the resulting solution?
Options:
3.5
4.0
4.5
3.3
Show Answer
Answer:
Correct Answer: D
Solution:
When equal volumes of a solution are mixed, the concentration is halved.
$ \therefore $ $[{H^{+}}]=\frac{1}{2}({10^{-3}}+{10^{-5}})=5.05\times {10^{-4}} $
$ \therefore $ $pH=3.3 $
BETA
