Calculate the pH after 0.010 mol gaseous HCl is added to 250.0 ml of each of the following buffered solutions.
a. 0.050 M NH3/ 0.15 M NH4Cl
b. 0.50 M NH3/ 1.50 M NH4Cl
Do the two original buffered solutions differ in their pH or their capacity? What advantage is there in having a buffer with a greater capacity?