Equilibrium Question 448
Question: $ pH $ of $ HCl,({10^{-12}}M) $ is [CPMT 1997; Pb. PET/PMT 1999]
Options:
A) 12
B) $ -12 $
C) $ \approx 7 $
D) 14
Show Answer
Answer:
Correct Answer: C
Solution:
As the solution is acidic $ pH<7 $ . This is because $ [{H^{+}}] $ from $ H_2O[{10^{-7}}] $ cannot be neglected in comparison to $ {10^{-12}} $ M.