please help with part B (a) Assume that you have a solution of an unknown solute

Question

please help with part B

(a) Assume that you have a solution of an unknown solute inCyclohexane. If the solution has freezing point depression of9.50 C , what is the Molality of this solution. Molar freezingpoint constant is 20.2 C/m .

(b) -since the thermometer used has markings for each Celsiusdegree, assume that you can be certain of the freezing pointof depression only to within ± 0.2 C .if the freezing pointof depression is measured as 9.7 C, than what Molality would bereported for the solution.

Explanation / Answer

a) Given data Tf = 9.5 0C    Kf = 20.2 0C/m We know that    Tf =  Kf * molality   molality =  Tf  /  Kf                     = (9.5 0C) /( 20.2 0C/m)                     = 0.47 m b) Given data Tf = 9.7 0C    Kf = 20.2 0C/m We know that    Tf =  Kf * molality   molality =  Tf  /  Kf                     = (9.7 0C) /( 20.2 0C/m)                     = 0.48 m b) Given data Tf = 9.7 0C    Kf = 20.2 0C/m We know that    Tf =  Kf * molality   molality =  Tf  /  Kf                     = (9.7 0C) /( 20.2 0C/m)                     = 0.48 m Tf = 9.7 0C    Kf = 20.2 0C/m We know that    Tf =  Kf * molality   molality =  Tf  /  Kf                     = (9.7 0C) /( 20.2 0C/m)                     = 0.48 m

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---