Chemistry 121 experiment 19 molar mass determination y depression of the freezing point introduction: the most commonly used liquid is water. From the measurements of mass and number of moles the molar mass on an the accurate thermometers are used to determine the freezing point depression in urine. Page 1 of 10 experiment: molar mass determination by depression of the freezing point introduction water is the most common liquid we encounter in our daily lives.
Molar mass is useful to identifying an unknown substance methods such as using finding the freezing point depression of an unknown substance can help in finding the identity. Colligative properties: freezing-point depression and molar mass let's become familiar with colligative properties and to use them to determine the molar mass of . Molar mass by freezing point depression using the kf you determined in part 2 you can now determine the molar mass of the ap freezing point depression lab.
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. Determination of a freezing point depression depression by observing the using this information, you will be able to determine the molar mass of the . Santa monica college chemistry 12 determination of molar mass by freezing point depression page 1 of 1 name: date: lab section:.
Determination o molar mass by freezing-point depression when a solute is dissolved in a solvent, the reezing temperature is lowered in proportion to the number o moles o solute added. Q1: calculate and enter the freezing point depression of a solution of 802 g ethylene glycol (c2h6o2) in 832 g h2o k(subscript)f for h2o is 186 °c kg/mol q2: a solution which contains 603 g of an unknown molecular compound in 352 g of water freezes at -562°c. Answer to advance study assignment: determination of molar mass by depression of the freezing point a student determined the molar. Lab 7 - determination of the molar mass of an unknown solid by freezing point depression goal and overview in the first part of the lab, a series of solutions will be made in order to determine the freezing point depression constant, k f, for cyclohexane. Determination of molar mass by freezing-point depression 141 determination of molar mass by freezing-point depression objectives: gain familiarity with colligative properties of nonelectrolyte solutions.
Calculation of molecular weight from freezing point depression data problem: the freezing point of a solution that contains 100 g of an unknown compound, (a), . Please help me with this problem i think that i am over thinking the calculations a student determines the molar mass of acetone, ch3coch3, by the method used in this experiment. From the freezing-point depression the molar mass of the dissolved substance 5-07 g of ethylene glycol into one of the test tubes and determine the exact mass. Molecular mass by freezing point depression prelab purpose graphs conclusion 1 to determine the molecular mass of an unknown substance by finding the freezing point of two solutions (bht and para-dichlorobenzene, and bht and the unknown.
Using freezing-point depression to find molecular weight known mass of lauric acid, and determine the lowering of the freezing temperature of the solution. Page i-57 / molar mass determination by freezing point depression lab procedure: part b: determination of molecular weight of a benzoic acid. 1 calculate the molar mass of an unknown solid (assume a non-electolyte) if, 135 grams of the solid was dissolved in 15 grams of dodecanol and caused a freezing point depression of 234 deg c freezing point depress constant for dodecanol is 29 i can do this problem, first calculate molality, then how many moles in the liquid and finally the . This document is the lab report from the freezing point depression and determining molar mass by freezing point depression 2-14 determination of the .
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. Purpose: the purpose of this experiment was to use the freezing point depression caused by the dissolution of solute in a solvent in order to determine the molar mass of the solute. 12 experiment 1: colligative properties determination of the molar mass of a compound by freezing point depression objective: the objective of this experiment is to determine the molar mass of an unknown solute by.