Equilibrium Question 395
Question: The pH value of $ 1.0\times {10^{-8}}M,HCl $ solution is less than 8 because
Options:
A) $ HCl $ is completely ionised at this concentration
B) The ionization of water is negligible
C) The ionization of water cannot be assumed to be negligible in comparison with this low concentration of $ HCl $
D) The pH cannot be calculated at such a low concentration of $ HCl $
Show Answer
Answer:
Correct Answer: C
Solution:
As the solution is acidic, $ pH<7 $ . This is because $ [{H^{+}}] $ from $ H_2O $ cannot be neglected in comparison to $ {10^{-8}} $ .
