Chem1105 - Gen. Chem. I Lab

Exp 10 - Determining Molecular Geometries from Lewis Dot Structures

Drawing Lewis dot structures

VSEPR theory for determining molecular geometry

Exp 9 - Calorimetry and Hess's law

Introduction to Hess's law

Combustion of Magnesium

Part 1 - Calibration of calorimeter

Part 2 (Mg + HCl) and part 3 (MgO + HCl)

OTHER VERSIONS

Part 1 video

Part 2 video

Exp 8 - Determination of Oxalate by redox titration

Using the analytical balance to weigh solids

Redox titration

Exp 7 - Properties and Reactivity of Aqueous Solutions

Using the conductivity meter to classify substances

Exp 6 - Colorimetric Analysis:  How Pure is my Aspirin?

Calibration of salicylic acid standard solution

How to use the Vernier LabQuest

Determination of the concentration and purity of aspirin sample

Create a graph using Logger Pro 3.16

Exp 5 - How much aspirin can I make?

Synthesis of aspirin

Melting point determination for aspirin

Example - mole ratio and stoichiometry calculations

Example calculation for Exp 5

Exp 4 - Determination of the Chemical Formula of Copper Chloride Hydrate

Experimental procedure:

1. Heating copper chloride hydrate

2. Dissolving dehydrated copper chloride

3. Displacement of copper by aluminium (notice the bubbles)

4. Deposition of copper on aluminium wire

5. Vacuum filtration of copper

Useful videos:

How to use a Bunsen burner

How to perform vacuum filtration using a Buchner funnel

Preview of experiment (This is similar, not identical, to how this experiment is performed - read lab procedure to identify the differences)

Exp 2 - Properties and changes of matter

Useful videos

1. Heating iodine crystals (Class experiment)

2. Iodine solubility

3. Melting point determination (we will not use the long tube shown in this video), class experiment

4. How to use a Bunsen burner (watch until 2:51)

5. Oxidation of copper, video 2 - PART 3A of the datasheet

6. Reaction of iodine with starch