CHEM 1212 Lecture 1: Boiling Point Determination
Premium

2 Pages
55 Views
Unlock Document

Department
Chemistry & Chemical Biology
Course
CHEM 1212
Professor
Edward H.Witten
Semester
Fall

Description
Boiling Point Determination Christina Weber Introduction: To learn how to investigate the physical property of boiling point. To carry out experiments using a “micro” technique and calibration curve. Chemical Responsibility: The unknown chemicals have hazards associated with them: methanol, isopropyl alcohol, and ethanol are flammable liquids and are toxic by ingestion. Wear goggles to protect your eyes from the chemicals, and avoid touching broken glass. Be careful while putting the rubber stopper on the thermometer, for it can break. Throw all broken glass in the broken glass box, and discard the unknown liquid from the small test tube into the bottle labeled WASTE EXPERIMENT BOILING POINT UNKNOWNS. Report sheet and sample calculations: see attached sheet and graph Results: The boiling point was determined through the assembly of a thermometer attached to a small test tube with rubber bands. Inside the test tube was a capillary tube submerged with an unknown liquid. This liquid/thermometer apparatus was placed in a beaker filled with water. This was placed over a Bunsen burner to allow the water to boil. When bubbles rose steadily from the capillary then the heat was removed and the tube was observed until the bubbles terminated. When this occurs, the temperature must be read on the thermometer. When this occurred it means the boiling point of the unknown has been found, which is when the pressure vapor inside the small capillary tube is equal to the atmospheric pressure. This procedure was repeated twice to attain a measurable boiling point and to test
More Less

Related notes for CHEM 1212

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit