Question

What volume of water should be used to make a saturated solution with 150 grams of solute at 30 degrees?

Answer 1

According to the given graph, at 30 degrees, the solution is saturated with 200g of solute per 100mL of water.

It means that if we have 150 grams of solute:

$150g\cdot\frac{100mL}{200g}=75mL$

75mL should be used to have a saturated solution.