Question 1. A 2.700×10−2M solution of NaCl in water is at 20.0∘C. The sample was created…

Question 1.

Place Order

A 2.700×10−2M solution of NaCl in water is
at 20.0∘C. The sample was created by dissolving a sample of NaCl in
water and then bringing the volume up to 1.000 L. It was determined
that the volume of water needed to do this was 999.3 mL . The
density of water at 20.0∘C is 0.9982 g/mL.

a.)Calculate the molality of the salt solution.

B.) Calculate the mole fraction of salt in this solution.

C.) Calculate the concentration of the salt solution in percent
by mass.

D.) Calculate the concentration of the salt solution in parts
per million.

Question 2.

Assuming complete dissociation of the solute, how many grams of
KNO3 must be added to 275 mL of water to produce a solution that
freezes at −14.5 ∘C? The freezing point for pure water is 0.0 ∘C
and Kf is equal to 1.86 ∘C/m.