Answer to Question #337106 in General Chemistry for Thel

General Chemistry

Question #337106

What is the pH of the solution containing 0.20 M NH3 and 0.15 M NH4Cl?

Expert's answer

K_b (NH₃) = 1.8•10^-5

pK_b= 4.74

pOH = pK_b- log (NH₄Cl/NH₃)

pOH = 4.74 - log(0.2/0.15)= 4.62

pH = 14 - pOH = 14 - 4.62 = 9.38

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