Problem- Choose a compound to make a buffer of pH=9 and calculate the weight of the buffer needed to make 100ml of 0.1M solution.
a) Caps: pKa=10.4 MW=221.32
b) Tris: pKa=8.1 MW=121.14
c) Sodium phosphate: pKa 2.15/6.81/12.38 MW 119.98
Please answer only if you are 100% confident