Asked by Anonymous
Substance X raises the boiling point of 150g of water to 101.3 C. What is the molecular mass of substance X? (assume x does not ionize/ is not volatile)
Answers
Answered by
DrBob222
delta T = K <sub>b</sub>*molality.
molality = mols/kg solvent
molality = mols/kg solvent
Answered by
Anonymous
what is the value for Kb? .52?
Answered by
DrBob222
Yes, K<sub>b</sub> is 0.52 for water.
By the way, the K<sub>f</sub> for water is 1.86 degrees c/m. I think I may have given you 0.52 for the freezing point constant in an earlier problem.
By the way, the K<sub>f</sub> for water is 1.86 degrees c/m. I think I may have given you 0.52 for the freezing point constant in an earlier problem.
Answered by
Anonymous
Yes, I just wanted to verify it was the same thanks
Answered by
DrBob222
It isn't the same. Kf for water is 1.86.
Kb for water is 0.52
Kb for water is 0.52
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