osmosis

Question 1

osmole

Answer 1

amount of particles equal to avogadro’s number, 6.02 x 10 to the 23

Question 2

osmolarity

Answer 2

amont of osmotically active particles present per litre of solution mmol/L

Question 3

osmolality

Answer 3

amount of osmotically active particles present per kg of solvent mmol/kg

Question 4

osmotic pressure

Answer 4

pressure exerted in sealed system due to osmotically acitve particles on one side of semipermeable membrane, kPa. One osmole of solute exerts 101.325kPa when dissolved in 22.4L of solvent at 0 degrees C

Question 5

Colligative properties

Answer 5

properties of solution that vary with its osmolarity

• freezing point depressed by 1.86 degree cfor every osmole solute per kg solvent
• vapour pressure decreases
• boiling point elevated
• osmotic pressure increased

Question 6

Raoult’s law

Answer 6

depression of freezing point or reduction in vapour pressure of solvent proportional to molar concentration of solute