UsingFreezing-PointDepression to FindMolecularWeightFormalLabReport
The purpose of this lab is to be able to use the freezingpoint of a substance to find the molecularweight of it. To do this, we will use the Logger Pro program to obtain the freezingpoint of lauric acid and a...
The melting point is the temperature at which the crystal structure of a solid breaks down with increasing entropy (+ΔS). Solute particles introduced into the solvent increases the entropy, and therefore decreases the temperature of the solution in order to reach the melting or freezingpoint of the solution...
Peter Jeschofnig, Ph.D. Version 42-0149-00-01
This document is not meant to be a substitute for a formal laboratory report. The LabReport Assistant is simply a summary of the experiment’s questions...
outcome, both as demonstration and participation exercises. The laboratory activities listed are recommended by the AP College Board, but other similar labs may be substituted. A minimum of 20 of these will be performed during the year. Each week, 120 minutes should be allocated for a laboratory experiment...
UsingFreezing-PointDepression to FindMolecularWeight
In this lab, the purpose was to use the freezingpointdepression method to determine the molecularweight of aspirin. This was done by determining the freezing of t-butanol and that of a t-butanol and aspirin solution; then finding...
are going to deal with is colligative properties. One colligative property that was dealt with in this lab was the freezingpointdepression, which is the process of decreasing the freezingpoint of any solvent by adding an unknown solute because the solute atoms affect the attractive powers between...
between moles and grams of a substance is often important. This conversion can be easily done when the atomic and/or molecular mass of the substance(s) are known. Given the atomic or molecular mass of a substance, that mass in grams makes a mole of the substance. For example, calcium has an atomic mass of...
DETERMINING MOLECULE WEIGHT BY FREEZINGPOINTDEPRESSION METHOD
STUDENT NAME :
LAB PARTNERS |
According to Anne, n.d, the freezingpoint of a liquid is decreased by adding to another compound to it. This is known as freezingpointdepression. The pure solvent will have...
Chemistry Lab II Spring 2007
Dr. Jeffrey Bodwin email@example.com
407H Hagen Hall 477-4371 (office) web.mnstate.edu/bodwin/
Office hours: See web page (above)
Required Materials: Laboratory notebook with carbon-copy pages (MSUM bookstore)
Experiments for General Chemistry Lab II (Chem Dept)
Colligative Properties Lab Blk: Date:
FreezingPointDepression of Acetic Acid – Acetamide Solution Lab#________
How does antifreeze lower the freezingpoint of water in the cooling systems of automobiles? In the late nineteenth century the French...
GENERAL INSTRUCTIONS TO THE STUDENTS
▪ Check each piece of apparatus, which you find in your locker from the duplicate list furnished to you by your instructor. Sign your name and submit to your instructor. The instructor signs the checklists...
Title: Colligative Properties & Osmotic Pressure
Important terms to study from this lab assignment are colligative properties, membrane permeability and osmotic pressure. First, colligative properties are “those of a solution that depend solely on the number of solute particles present...
both of these instances, salt is acting to lower the freezingpoint of water.
For the ice cream maker, because the rock salt lowers the freezingpoint of the ice, the temperature of the ice/rock salt mixture can go below the normal freezingpoint of water. This makes it possible to freeze the ice cream...
Jeff Tanaka, and Yang Zhao
“I pledge that this report, the data in it, and interpretations are my
work, except where referenced. I have neither obtained nor given
aid on this assignment outside of data discussions with my lab
team. “ Signed_________________________________________
Colligative Properties Lab
Demonstration of Selected Calculations from Choice I
Determination of Kf for Naphthalene
To determine the Kf for naphthalene, we need to find the difference in the freezingpoint of pure naphthalene and the solution of 1,4-dichlorobenzene in naphthalene. Let's...
arrangement of the atoms, ions, or molecules of the substances and by the strength of the forces of attraction between the atoms, ions, or molecules. C4.4: Molecular Polarity The forces between molecules depend on the net polarity of the molecule as determined by shape of the molecule and the polarity of the bonds...
substance D is Glycine.
2) Finding the concentration of a known solution
Table 1.2: Table used for the preparation of the calibration curve used to find the concentration of alcohol in a wine. 0.2mL of each sample were taken and placed in the Osometer.
Ethanol sample (g EtOH/100mL) | Osmolality (mOsm/kg...