given that the solubility of sodium chloride is 36 grams per 100 grams of water.?

Question

which of the solutions would be considered unsaturated?
a) dissolve 1.85 moles of NaCl in 300 ml of water
b) dissolve 5.8 moles of NaCl in 1 L of water
c) dissolve 3.25 moles of NaCl in 500 ml of water
d) none of these

Answer 1

Molar mass NaCl = 58.4 g/mol

1 liter of H2O weights 1000 g

solubility = 36 / 100 = 0.36

a)1.85 mol x 58.4 g/mol = 108.1 g

108.1 g / 300 g = 0.360

b) 5.8 x 58.4 =338.7 g

338.7 g / 1000 = 0.339 < 0.36 UNSATURATED

c) 3.25 x 58.4 = 189.8 g

189.8 / 500 = 0.380

the answer is b

Answer 2

36/(22.99 + 35.45)/100 = 0.00616 mole/ml
(0.00616 mole/ml)(1,000 ml/L) = 6.16 moles/L
b) is unsaturated

Answer 3

b)