NEET 2007 Chemistry question

Chemistry Equilibrium NEET 2007

Calculate the pOH of a solution at that contains of hydronium ions, i.e. :

(1)1.000
(2)7.000
(3)4.000Correct
(4)9.000

Answer: (3)

Solution

. At 25 °C, , so (equivalently $[OH^-] =

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Question ID VK-089850