Question

A buffer solution is prepared by mixing 50.0 mL of 0.300 M NH3 with50.0 mL of 0.300 M NH4Cl. the pKb is 4.74.

NH3 + H2O ? NH4+ + OH -

a) Calculate the [NH3] and [H4Cl] in the buffer solution. Calculatethe pH of the buffer solution.

b) 7.50 mL of 0.125 M HCl is added to the 100.0 mL of the buffersolution. Calculate the new [NH3] and [NH4Cl] for the buffersolution. Calculate the new pH of the solution

c) 7.50 mL of 0.125 M NaOH is added to the 100.0 mL of the buffersolution. Calculate the new [NH3] and [NH4Cl] for the buffersolution. Calculate the new pH of the solution.

***Please give a thorough step-by-step solution for each part.Please include all units in your work so I can keep track of whateverything is measured in! Thanks!***