How much kilograms of ethylene glycol (C2H6O2) should be added to 25 kg of water to lower the freezing point by 45.0C'? Kf for water is 1.86 C'/m.

Question

anonymous · Answer

Colligative Properties. I think.

abb0t · Answer

First you need to find molality.

abb0t · Answer

$\Delta T = K_f m$

anonymous · Answer

I know the delta formula...

abb0t · Answer

$K_f$ = specific heat (which you're given)
m = molality in this case.
$\Delta T$ = heat.

abb0t · Answer

Solving for molality, you get ________ ?

abb0t · Answer

next, solve moles (I think you should convert kg ->g first. But you can also de it after. that way you can eventually use dimensional anslysis to find moles using the molar mass of ethylene glycol.

anonymous · Answer

k. thanks bro i got this.