How many grams of glucose, C6H12O6, are required to lower the freezing point of 150g of water by 0.75 degrees celcius? What will be the boiling point of the solution?
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OpenStudy (anonymous):
@shrutipande9
OpenStudy (anonymous):
@thomaster
OpenStudy (anonymous):
can you help me with this assignment :D
OpenStudy (shrutipande9):
Kf for water is 1.86 deg C/m
OpenStudy (anonymous):
what is the working formula?
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OpenStudy (shrutipande9):
\[DeltaTf = Kf * m\]
0.75 = 1.86 * moles of solute/weight of solvent
OpenStudy (shrutipande9):
can u put the necessary values?
OpenStudy (anonymous):
|dw:1425208421108:dw|
OpenStudy (shrutipande9):
u are 1 step ahead of me..:D
great..:) now can u find the value of W of solute
OpenStudy (shrutipande9):
r u there? @~Gelmhar
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OpenStudy (anonymous):
11g
OpenStudy (anonymous):
now the boiling point :D
OpenStudy (shrutipande9):
10.8 to be precise...but yaay u got it...
OpenStudy (anonymous):
bec'z i compute 10.89 lol
OpenStudy (shrutipande9):
now elevation in boiling point is \[\Delta Tb = Kb * m\]
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OpenStudy (anonymous):
0.512 = Kb?
OpenStudy (shrutipande9):
yep
OpenStudy (anonymous):
m= 0.41 m
OpenStudy (anonymous):
so i will just times, them?
OpenStudy (anonymous):
Tbsolvent = 100
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OpenStudy (shrutipande9):
so m *o.512
OpenStudy (anonymous):
0.21 + 100
so i got 100.21 as the boiling point
OpenStudy (shrutipande9):
yep..:D
OpenStudy (anonymous):
we have exam tommorow .. im glad you guide me here LOL
OpenStudy (shrutipande9):
all d best for tomo..:D
u will do good..:)
if u think a user helps u..always appreciate them with a medal..:)
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OpenStudy (anonymous):
can you help me with another problem :D
OpenStudy (shrutipande9):
sure
OpenStudy (anonymous):
I will grand your wish if you help me 1 more time :D
OpenStudy (shrutipande9):
just make a new ques..:)
OpenStudy (anonymous):
Is it ok, if i will just type the question here or make another?
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