4.1 Solutions

Question 1

Molarity (M)

Answer 1

mols of solute/ Liters of solution

Question 2

Molality (m)

Answer 2

mols of solute/ kg of solent

Question 3

What are the two solubility rules you should know?

Answer 3

1 All group 1 metals, NO3-, NH4+, ClO4-, C2H3O2- salts are soluble.

Question 4

The three phase solubility rules

Answer 4

1 Solids are more soluble at high temperatures.

Question 5

Freezing point and boiling point equation?

Answer 5

ΔT(f or b) =i K(f or b) m

ΔT = Change in temperature
i= vant hoff factor
K (f or b)= given constant
m= molality

Question 6

Vapor pressure depression (Raults law)

Answer 6

P = X x P
P= Partial Pressure
X = mole fraction
P = Partial Pressure of pure water (22mmHg)

Question 7

Osmotic Pressure

Answer 7

π = iMRT
π = Osmotic pressure
M = Molarity
R = ideal gas constant (0.08206)
T = Temperature