Solubility Curves of Selected Compounds

Grams of solute
per 100 g H2O
Temperature (C)
At one point, ammonia and potassium nitrate have the same solubility. At that point the solubility of the compounds is
• 77 g/100 g water
• 44 g /100 g water
40 g/ 100 g water
25 g/100 g water

The compounds with the same solubility at that point are ammonia and potassium nitrate, both having a solubility of 77 g/100 g water.