tywower
  • tywower
A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Vocaloid
  • Vocaloid
freezing point depression = iKm where i = vant hoff factor = 1 m = molality of the solution k = -1.86 know where to go from there?
tywower
  • tywower
not really
Vocaloid
  • Vocaloid
first find the molar mass of glucose

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More answers

tywower
  • tywower
|dw:1449524358207:dw| ok how do you do that
Vocaloid
  • Vocaloid
well, they give you the formula C6H12O6 so look at a periodic table and find the masses of carbon hydrogen and oxygen
Vocaloid
  • Vocaloid
tag me when you've finished
tywower
  • tywower
180.1559 g/mol is the molar mass of glucose @Vocaloid
Vocaloid
  • Vocaloid
did you just google that?
Vocaloid
  • Vocaloid
look at a periodic table and find the molar mass of carbon, hydrogen, and oxygen like I asked you to
tywower
  • tywower
carbon:12.01 hydrogen:1.0 oxygen: 15.9 @Vocaloid
tywower
  • tywower
@Vocaloid
Vocaloid
  • Vocaloid
good. now the formula C6H12O6 means we multiply the molar mass of carbon by 6, the molar mass of hydrogen by 12,and the molar mass of oxygen by 6 then add everything together to get the molar mass of glucose
tywower
  • tywower
72+12+96=180 @Vocaloid
Vocaloid
  • Vocaloid
good. you need to be able to do the molar mass by looking at a periodic table only
Vocaloid
  • Vocaloid
now convert 15.5 grams of glucose to moles
tywower
  • tywower
0.08603660341253 mol
tywower
  • tywower
@Vocaloid
Vocaloid
  • Vocaloid
good, sorry for the delays, this website lags
Vocaloid
  • Vocaloid
now convert 245 g of water to kg
tywower
  • tywower
0.245 kg @Vocaloid
Vocaloid
  • Vocaloid
good now, to find molality, just divide moles/kg
tywower
  • tywower
0.35
tywower
  • tywower
@Vocaloid
Vocaloid
  • Vocaloid
good now go back to the first thing I posted, you should be able to solve it now
tywower
  • tywower
-0.651?
tywower
  • tywower
@Vocaloid
tywower
  • tywower
@Vocaloid
Vocaloid
  • Vocaloid
good
tywower
  • tywower
thats the answer?

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