solutions

Question 1

solutions

Answer 1

a homogenous mixture - uniform composition and concentration throughout

• solute dissolved in solvent

Question 2

concentration

Answer 2

a measure of how much solute is dissolved in solvent

Question 3

grams per litre (g/L)

Answer 3

conc (g/L) = mass solute (g) / volume solution (L)

Question 4

moles per litre (mol/L)

Answer 4

conc(mol/L) = moles solute (mol) / volume solution (L)

n = cV

Question 5

% composition by mass

Answer 5

conc(%) = (mass solute / mass solution) x 100

Question 6

parts per million

Answer 6

ppm = mass solute (mg) / mass solution (kg)

Question 7

dilution

Answer 7

when you add water, the amount of solvent increases, so the solute becomes more spread out or “diluted” and the concentration decreases

formula: C1V1 = C2V2

Question 8

unsaturated solution

Answer 8

• a solution that contains less solute that it is able to dissolve at a given temperature

Question 9

saturated solution

Answer 9

• a solution that contains as much solute as it can normally dissolve at a given temperature

Question 10

supersaturated solution

Answer 10

• a solution that contains more solute that it is able to dissolve at a given temperature