A buffer solution is prepared in which the concentration of NH3 is 0.3 – McqOptions

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1.	A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of is 0.20 M. If the equilibrium constant, Kb for NH3 equals 1.8 × 10–5, what is the pH of this solution?
A.	8.73
B.	9.43
C.	9.08
D.	11.72
Answer» C. 9.08

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