Equilibrium Question 381

Question: The $ pH $ of a $ {10^{-9}}M $ solution of $ HCl $ in water is [UPSEAT 2000, 02]

Options:

A) 8

B) - 8

C) Between 7 and 8

D) Between 6 and 7

Show Answer

Answer:

Correct Answer: D

Solution:

As the solution is acidic, $ pH<7 $ . This is because $ [{H^{+}}] $ from $ H_2O,[{10^{-7}}M] $ cannot be neglected in comparison to $ {10^{-10}} $ M



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