Question

How much dry weight (not in solution) ammonium sulfate would you need to saturate 500 ml up to 35%? How much would you need to saturate a solution up to 55%?

Answer 1

This has to be an experimental exercise as we have no information about the solubility constant of ammonium sulphate salt.

According to Dawson et al. (1986); several experiments were performed to dissolve ammonium suphate in water at zero degree celsius and it was observed that the amount of ammonium sulphate required to go from 0% saturation to 35% saturation at this temperature is : 19.7 grams per 100 mL which means, we require 98.5 grams of ammonium suphate for 35% saturation of a 500mL solution..

Similarly the amount of ammonium sulphate required to go from 0% saturation to 55% saturation at this temperature is : 33.1 grams per 100 mL which means, we require 165.5 grams of ammonium suphate for 55% saturation of a 500mL solution.