Case One

Complete your first virtual laboratory assignment using ChemCollective’s interactive lab on Cobalt Chloride and LeChatelier’s Principle athttp://chemcollective.org/vlab/85

Read the problem description for this experiment.

1. For steps 1, 2, 3 and 5, perform at least 3 trials of each measurement. For each trial, you may perform steps 1–3 and 5 on the same sample.
2. Write a full lab report presenting your results and conclusions using the same guidelines for writing lab reports that you used in Chem 101L. These guidelines can be found at the websites below.
3. Calculate the average value for K and calculate the 90% confidence interval.

Assignment Expectations

Using the following resources to write a lab report that you will submit as a Word document or pdf file into your Case drop box.

How to write a lab report

http://www.chem.purdue.edu/courses/chm115/Laboratory/Records___Reports/Sample_Lab_Report/sample_lab_report.html

Calculation of standard error

http://www.wikihow.com/Calculate-Mean,-Standard-Deviation,-and-Standard-Error#The_Standard_Error_of_the_Mean_sub

Calculation of confidence intervals

http://www.wikihow.com/Calculate-Confidence-Interval