you will need around 100 mL of buffer
solution. Determine how many mL of the weak acid (ammonia) and its conjugate base (ammonium ion) you will need to combine to
get about 100 mL of buffer solution with your desired pH of 10. Here are some hints to help. Since the weak acid and its conjugate base are in the
same solution at the end, the volume part of the concentrations are the same so
moles of conjugate base = moles of weak acid.
Since the weak acid and conjugate base solutions you will be using have the same initial concentrations
(0.100 M), then
moles of conjugate base = mL conjugate base solution
moles of weak acid = mL weak acid solution