MHT CET 2024 Chemistry question

Chemistry Equilibrium MHT CET 2024

What is the value of pOH if a buffer solution is prepared by mixing equal volumes of 0.4 M NHOH and 0.5 M NHCl solutions (pKb = 4.730)

(A)6.0
(B)4.83Correct
(C)10.42
(D)7.81

Answer: (B)

Solution

This is a basic buffer, so . On mixing equal volumes each concentration is halved (to 0.2 M and 0.25 M ), but the ratio is unchanged: $ =

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Question ID VK-092779