Solubility Quiz

1.    What species (that is, molecules and/or ions) are present in the following aqueous solutions:

(a)  sodium chloride, NaCl

(b) potassium nitrate, KNO₃ mixed with sodium chloride

(c)  barium chloride, BaCl₂ mixed with silver nitrate, AgNO₃

2.    What is the mass percent (m/m) of NaCl in a solution made by dissolving 2.0 g of NaCl in 56.0 g of water? (Show your work)

3.    A solution is made by mixing 25 mL of methanol, 50 mL of ethanol, and 100 mL of water. What are the volume percent (v/v) of methanol and ethanol respectively in the solution? (Show your work)

Calculate the grams of sugar in 225 g of 8.00 % (m/m) sugar solution.