Question

"An unsaturated solution is formed when 80 grams of salt is dissolved in 100 grams of water at 40° celsius. This salt could be... "
1. KNO3 2. KCL 3. NaNO3 4. NaCL
>>>I know the answer is NaNO3 however I do not know how to arrive at this answer. NaNO3 on the graph (Table G - Solubility Curves at Standard Pressure) is above the line which would make supersaturated. Why is this the answer?

Answer 1

Answer:

3. NaNO3

Explanation:

Below the line on TABLE G in the reference tables at 40C