An unsaturated solution is made by completely dissolving 20.0 grams of NaNO3

in

100.0 grams of water at 20.0°C.

56 In the space in your answer booklet, show a correct numerical setup for calculating the

number of moles of NaNO3

(gram-formula mass = 85.0 grams per mole) used to make

this unsaturated solution. [1]

57 Determine the minimum mass of NaNO3

that must be added to this unsaturated

solution to make a saturated solution at 20.0°C. [1]

58 Identify one process that can be used to recover the NaNO3

from the unsaturated