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Question

Chemistry Question on Equilibrium

What is pOHpOH of an aqueous solution with hydrogen ion concentration equal to 3×10−5 mol L−13 \times 10^{-5}\,mol\, L^{-1}?

A

9.479.47

B

4.524.52

C

12.6912.69

D

11.6911.69

Answer

9.479.47

Explanation

Solution

pH=−log[H+]pH = -log[H^+] =−log(3×10−5)= -log(3 \times 10^{-5}) =4.5229= 4.5229 pOH=14−pHpOH = 14 - pH, 14−4.5229=9.4714 - 4.5229 = 9.47