CHEM 1525
Chemistry Laboratory II
0.0 Credit
Description
CHEM 1525 (previously CHEM 165) is the second laboratory for a fundamental first year chemistry course, designed for students who have a Chemistry 11 background. This course provides the equivalent of a first-year university chemistry course when taken with its accompanying theory course, CHEM 1523 (previously CHEM 162). In order to complete the equivalent of the entire first year (6 credits) of university-level chemistry students need to complete OL CHEM 1503, 1523, 1505, 1525 (previously CHEM 160, 162, 164 and 165). The TRU on-campus equivalents of these courses are CHEM 1500 and 1520. The topics include a review of laboratory safety and equipment, anion and cation identification, properties of gases, thermochemistry and caloric content of food, equilibrium and Le Chatelier's principle, reaction order and rate of reaction, acid-base titrations, buffers, acid-ionization constant (Ka) determination, oxidation-reduction reactions, and electrochemical cells. Students are expected to become familiar with all these topics during the course and demonstrate their proficiency in various laboratory techniques.
Delivery Method
Continuous, Web
Prerequisites
It is strongly recommended that students' have TRU CHEM 1500 or TRU-OL CHEM 1503 (previously CHEM 160) and CHEM 1505 (previously CHEM 164) or equivalent and to have a first year General Chemistry such as TRU CHEM 1520 or TRU-OL CHEM 1523 (previously CHEM 162) theory or equivalent as a co-requisite.
Objectives
By the end of this course, you should be able to:
- Demonstrate and have an appreciation of basic laboratory safety concepts
- Demonstrate basic handling/clean-up of chemicals
- Demonstrate organized recording of experimental and observational data
- Display experimental results in data tables, construct and compare titration curves, and interpolate values
- Perform acid-base titrations using pH indicators and describe the neutralization reactions
- Perform dilution calculations and prepare standard solutions of known concentrations
- Determine the concentration of an unknown sample and compare to listed values
- Describe and prepare buffer solutions
- Perform oxidation-reduction reactions and relate to activity series
- Set up and use an electrochemical cell and compare experimental cell potentials with theoretical
- Demonstrate basic chemistry lab techniques such as weighing samples, reading scientific scales, performing accurate measurements, pipetting, titrating, using volumetric glassware, and using a multimeter
Course Outline
Safety Overview of basic laboratory safety concepts, terminology and WHMIS classifications, basic handling and clean-up of chemicals and equipment. You will be required to read the safety notes in the lab manual and complete an online quiz. You must pass this quiz before you are able to proceed to the experiments.
Experiment 1: Qualitative Anion Tests and Identification of Cations
Observe chemical reactions, make predictions, record observations, recognize chemical changes, and identify cations and anions.
Experiment 2: Properties of Gases
Write balanced equations for the generation of gases. Use various tests to determine the presence of hydrogen, oxygen, and carbon dioxide.
Experiment 3: Caloric Content of Food
Measure the energy content of combustible materials, perform heat calculations and compare experimental values to provided literature data.
Experiment 4: Le Chatelier's Principle
Observe shifts in chemical reactions and relate to impact on chemical equilibria, classify exothermic and endothermic reactions, make predictions about effect of change on chemical reactions.
Experiment 5: Reaction Order and Rate of Reaction
Write rate laws for reactions given reactant order, predict order of reactant, and define rates of reaction.
Experiment 6: Titration of Acetic Acid in Vinegar
Titrate vinegar using a pH indicator, describe the titration reaction, and calculate the percent acetic acid in vinegar.
Experiment 7: Determination of Ka for a Weak Acid
Titrate a weak acid and strong base. Construct and compare titration curves from experimental data and simulated titrations.
Experiment 8: Using Buffers
Create a buffer solution and observe the impact of pH changes on the addition of strong acids and bases.
Experiment 9: Oxidation-Reduction and the Activity Series
Perform oxidation-reduction reactions and relate observations to the activity series.
Experiment 10: Electrochemical Cells
Set up an electrochemical cell, measure cell potentials with a multimeter, compare experimental results to theoretical cell potentials. Relate concentration and cell potential using the Nernst Equation.
Maximum Completion
30 weeks maximum duration.
Required Text and Materials
TRU-OL Lab Kit by LabPaq: This lab kit includes your laboratory manual with specific instructions for each experiment as well as supplies and additional materials lists for each experiment.
A non-programmable, single numeric line calculator is required such as the Casio fx-260. TRU Chemistry does not permit textual input calculators, electronic devices, paper dictionaries or translating devices to be used on quizzes or final exams. We reserve the right to inspect any student calculator at any time.
Access to a digital camera, and a webcam or video camera to complete online laboratory journal and practical component of final invigilated exam.
Optional Materials
A first-year Chemistry textbook would be helpful.
Open Learning Faculty Member Information
An Open Learning Faculty Member is available to assist students. Primary communication is online or by phone and you will receive a welcome letter from your Open Learning Faculty Member with contact information when you start the course.
Assessment
Grades will be assigned on the following basis:
| Online Laboratory Journal |
25% |
| Final Laboratory Exam |
30% |
An aggregate total of at least 50% must be achieved on the sum of the lab reports and final laboratory exam in order to receive a passing grade.
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