jasflo99 jasflo99
  • 22-04-2018
  • Chemistry
contestada

determine the freezing point of a solution that contains 0.31 mol of sucrose in 175 g of water

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mkryukova19 mkryukova19
  • 22-04-2018
ΔT= T (solvet freezing point)-T (solution) =T(water freezing point)-T(solution)
ΔT =0⁰C - T(solution)

ΔT=[tex] K_{f} *m[/tex]


molality =(number mol solute)/kg solvent = 0.31mol/0.175 kg =(0.31/0.175)m
K(f water)=1.86⁰C/m
ΔT=1.86⁰C/m*(0.31/0.175)m=3.29⁰C
T(solution) =0⁰C - 3.29⁰C =3.29⁰C 

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