Equilibrium Question 544

Question: The $ pH $ of an aqueous solution having hydroxide ion concentration as $ 1\times {10^{-5}} $ is [MP PMT 1991]

Options:

A) 5

B) 9

C) 4.5

D) 11

Show Answer

Answer:

Correct Answer: B

Solution:

$ [O{H^{-}}]=1\times {10^{-5}} $

$ pOH=-\log [O{H^{-}}]=5 $

$ pH+pOH=14\Rightarrow pH=14-5=9 $ .



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