A buffer solution contains 2 moles of ammonium hydroxide and 0.25 mole of ammonium chloride per dm^(3) of the solution. (K_(b) for ammonium hydroxide = 1.8xx10^(-5)). Calculate the pH of the buffer solution.

A buffer solution contains 2 moles of ammonium hydroxide and 0.25 mole

1.	A buffer solution contains 2 moles of ammonium hydroxide and 0.25 mole of ammonium chloride per dm^(3) of the solution. (K_(b) for ammonium hydroxide = 1.8xx10^(-5)). Calculate the pH of the buffer solution.
Answer» Solution :It is a BASIC BUFFER `pOH=pK_(B)+"LOG"(["Salt"])/(["Base"])` = `4.74+"log"0.25/2=4.74+"log"0.25/2` = 4.74 - 0.90 = 3.64 pH = 14 - 3.64 = 10.36