SATHEE: Equilibrium Question 812

Equilibrium Question 812

Question: What is the pH of a $10^{- 4} M, O H^{-}$ solution at 330K, if $K_{w}$ at 330K is $10^{- 13.6}$ -

Options:

A) 4

B) 9.0

C) 10

D) 9.6

Show Answer

Answer:

Correct Answer: D

Solution:

Given at 330 K $K_{w} = 10^{- 13.6}$ i.e. $p K_{w} = p H + p O H$

$∴ p O H = - l o g [O H^{-}]$

$13.6 = p H + p O H$

$p O H = - l o g 10^{- 4}$

$p O H = 4$

$∴ p H = 13.6 - 4 = 9.6$

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Equilibrium Question 812

Question: What is the pH of a 10−4M,OH− solution at 330K, if Kw at 330K is 10−13.6 -

Options:

Answer:

Solution:

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Question: What is the pH of a $10^{- 4} M, O H^{-}$ solution at 330K, if $K_{w}$ at 330K is $10^{- 13.6}$ -