Equilibrium Question 889
Question: Equal volumes of two HCl solutions of $ pH=3 $ and were mixed. What is the pH of the resulting solution'
Options:
A) 3.5
B) 4.0
C) 4.5
D) 3.3
Show Answer
Answer:
Correct Answer: D
Solution:
When equal volumes are taken, the concentration becomes half.
$ \therefore $ $[{H^{+}}]=\frac{1}{2}({10^{-3}}+{10^{-5}})=505\times {10^{-6}} $
$ \therefore $ $pH=3.3 $
