[ixi]

how many grams of ammonium chloride and how many ml of 0.3 M NaOH are required to make 500 mL of a 0.1 M buffer. pH=9.5, pKa=9.2


my question is--in order to solve this problem, is it necessary at all to use the 0.3 M in the calculations? and if so, where?

thanks

[Borek]

To convert from moles NaOH to solution volume.

[ixi]

i found the moles to be 0.0333
so would it be--

0.0333 moles ( 1 L/ 3 moles)= 0.0111 L  ?

[AWK]

1. what does mean 0.1 M buffer
2. from pH and pK calculate ratio of NH₄⁺ to NH₃ (Henderson and Hasselbach present you compliments)
3. Then you have a stoichiometric problem

[Borek]