Question
a) An ethylene glycol solution contains 21.1 g of ethylene glycol in 86.0 ml of water. compute the freezing point of the solution.
b) Compute the boiling point of the solution.
b) Compute the boiling point of the solution.
Answers
DrBob222
moles ethylene glycol = grams/molar mass.
molality = moles/kg solvent.
Solve for molality.
delta T = Kf*m
Find freezing point form delta T knowing that the normal freezing point of water is zero C.
Same procedure for boiling point except
delta T = Kb*m
and add delta T to 100 C to find boiling point.
molality = moles/kg solvent.
Solve for molality.
delta T = Kf*m
Find freezing point form delta T knowing that the normal freezing point of water is zero C.
Same procedure for boiling point except
delta T = Kb*m
and add delta T to 100 C to find boiling point.
Emilene
what is Kf and Kb
DrBob222
Kf is the freezing point depression constant and it should be in your text or notes. Kb is the boiling point elevation constant and it should be available to you also. Kf in my text = 1.86 for water and Kb is 0.512 for H2O.
Hai
I'm terrible at these!!! I wish I could help you.