Answer to Question #121859 in General Chemistry for Oumaya

Question

1. Refer to the Solubility Curves below.

(a) What mass of K2SO4 can be dissolved in 100 mL of water at 70°C?

(b) At what temperature are the solubilities of KNO3 and KCl approximately equal?

(c) Why is it not possible to determine the molar concentration of a saturated solution of KClO3 at 25°C from its solubility curve? What additional information would be required?

(d) Which substance forms a saturated solution in which the mass ratio of solute to solvent is 1:1, and at what temperature?

Answer 1

a) From the curve, at 70°C temperature 50g of K2SO4 can be dissolved in 100 ml of H2O

b) At about 22°C temperature the solubility of KNO3 and KCl are equal

c) from solubility curve it is impossible to know the overall volume, that is the volume of the solution and volume of the solution requires to measure molarity

d) The curve is not given so it not possible to determine