Solutions: Equilibrium and Concentration

Question 1

What is the state of a system called when the solute is dissolving at the same rate as dissolved particles are recrystallizing?

Answer 1

Equilibrium

Question 2

What is a solution at equilibrium called?

Answer 2

Saturated solution

Question 3

If you add more solute to a saturated solution, will it dissolve?

Answer 3

No, it has the maximum amount of dissolved solute

Question 4

What is a solution with less than the equilibrium concentration of dissolved solute called?

Answer 4

Unsaturated solution

Question 5

What is a solution with more than the equilibrium concentration of dissolved solute called?

Answer 5

Supersaturated solution

Question 6

Are most solids are more soluble at higher or lower temperatures?

Answer 6

Higher

Question 7

Are gases more or less soluble at higher temperatures?

Answer 7

Less soluble

Question 8

Does increasing pressure increase or decrease the solubility of a gas?

Answer 8

Increased solubility

Question 9

What does Henry’s Law say?

Answer 9

Gas solubility is directly proportional to the partial pressure of a gas above a solution

Question 10

What is the equation for Henry’s Law?

Answer 10

S gas = kH * P gas
S gas = solubility
kH = Henry’s Law constant (mol/L*atm)
P gas = partial pressure

Question 11

Is a gas of greater mass more or less soluble in water?

Answer 11

More soluble in water

Question 12

What is molality (m)?

Answer 12

(mol solute)/(kg solvent)

Question 13

What is the formula for parts by mass?

Answer 13

(solute mass)/(solution mass)

Question 14

What is the formula for parts by volume?

Answer 14

(solute volume)/(solution volume)

Question 15

What is the formula for parts per million?

Answer 15

(grams of solute)/(grams of solution) * 10^6

Question 16

What is the formula for parts per billion?

Answer 16

(grams of solute)/(grams of solution) * 10^9