Answers p. 459, 461, 465

[Mr. Pringle]

p. 459
2a. heterogeneous (cloudy); 2b. homogeneous (clear); 2c. hetero- (not
clear); 2d. heterogeneous

3. solvent: major component; solute: minor component or what is
dissolved.

solvent solute
4a. water carbon dioxide gas
4b. water sugar / flavors
4c. water color/ caffeine/ flavors
4d. water salt

5. No, alloys are metal solutions, & air is a solution of gases

p. 461.
Do ppm by using a ratio

given amount solute = x parts |> so it is
given amount solvent 1,000,000 |> x parts per million

1. 3 X 10^-4 g = x parts |> solve for x
200 g H2O 1,000,000 |> x = 1.5 ppm

2. 127 ppm
3. 4250 ppm

p. 465
Solve for moles, then convert mL to L (if necessary) then set up the
ratio moles per L

1. 5.0 g / 60.06 g = 0.0833 mol CH3COOH
100 mL = 0.1 L
So molarity is 0.0833 mol / 0.1 L = 0.833 M of CH3COOH
2. 1.001 M
3. 2.5 g KBr (remember 0.85 M = 0.85mol/1 L which is a conversion
factor)
4. 11 g NaCl