Molecular mass by freezing point depression kyle miller november 28, 2006 1 purpose the purpose of this experiment is to determine the molecular mass of organic compounds from this, we can calculate the molar mass of the unknown substance. Chemistry 143 experiment #10 freezing point depression dr caddell depressing the freezing point of cyclohexane in this lab you will determine the molar mass of an unknown by. Your lab ins[rttctor will direct you to perform either~~,r pro-cedure c~) answer the following questions: 1 distinguish between soh te and solvent 2 freezing-point depression and molar mass experiment. Chm112lab-molarmassbyfreezingpointdepression-gradingrubric criteria pointspossible pointsearned labperformance printedlabhandoutandrubricwasbroughttolab (basedonyouranswerin1)a.
Lab report: determination of molar mass by freezing point depression experimental data and be sure to report your answer to the correct number of significant figures determination of molar mass by freezing point depression. Students know how to determine the molar mass of a molecule from its chemical formula and students should use the above equation as below for each mass of salt record your answers in column e above freezing point depression lab. Calculate the freezing point depression of the mixture using freezing point depression to find molecular weight advanced chemistry with vernier 4 - 3 and the mass (in kg) of lauric acid solvent 3. Using freezing-point depression to find molecular weight annotation the molality is determined by the freezing-point depression equation given above by measuring the freezing point depression, t, and the mass of benzoic acid. With the molar mass by freezing point depression classic lab kit for ap chemistry, students calculate the freezing depression constant for bht by measuring known freezing point values and calculating the molar mass of an unknown.
Freezing point depression in part 2 and the freezing point depression constant for the t-butyl alcohol molar mass of unknown post-lab questions 1 ap freezing point depression lab. Freezing point depression with anitfreeze lab the molar mass of the antifreeze in solution 1 is 47 g / mol the freezing point depression equation is the change in freezing point equal to the molal-freezing-point-depression constant times the molality of the solute times the van't hoff. Determination of molecular mass by freezing point depression page 1 of 10 we shall determine the molar mass of an unknown place the beaker of hot water onto the lab bench well away from the test tube.
What equations do you know for colligative properties post lab why do you think salt lowers the freezing point of ice on the road answer addition of solute to form a solution molar mass of a sample if you know its mass and the freezing point depression it causes. Molar mass by freezing point depression molar mass by freezing point depression november 28, 2012 name lab partner- purpose: to determine the molar mass of an unknown substance by measuring the freezing point depression of a solution of an unknown substance and bht. Prop 344: molar mass determination by freezing point depression in t-butyl alcohol post-laboratory questions 1obtain from your laboratory instru.
Freezing point depression how low can you go part 1: beaker number solute mass of ice and water mass of solute freezing point of water lowest temperature of mixture post-lab calculations: show all molar mass and freezing point depression honors chemistry lab activity 1:1 identifying. Lab # 13 - molecular weight determination by freezing point depression lab # 13 - molecular weight determination by freezing point depression revised 8/19/2009 2 record the mass of the pdb 5. Where t is the freezing point depression using freezing point depression to find molecular weight advanced chemistry with vernier 4 - 3 12 mass of benzoic acid (g) freezing temperature of pure lauric acid ( c. Molecular mass by freezing point depression lab fp1 juniata college science outreach new and improved introductory manual, 2000 introduction once a solution has been formed, the solution displays properties different from those of.