AIPMT 2011 Physics and Chemistry Solved Paper

Question : 7 of 100

Marks: +1, -0

A buffer solution is prepared in which the concentration of NH3 is 0.30M and the concentration of NH4‌+is 0.20 M. If the equilibrium constant, Ks for NH3 equals 1.8×10−5, what is the pH of this solution ? (log‌2.7=0.433).