Author Archives: Charles Taylor

CHM 110: Shared data for Experiment 3B (Section 1, Monday)

Here’s the shared data from CHM 110 Experiment 3B. These are the ratios of mass product / mass barium chloride dihydrate that you need to complete the table on page 72 and answer the questions on pages 73 and 74 This is data for the Monday lab section (section 1)!

Ratio of (mass product / mass BaCl2.2H2O):

  • 0.84939
  • 0.85060
  • 0.85107
  • 0.82600
  • 0.85510

The write-up for Experiment 3B (pages 69-74) is due at our next lab meeting. If you have any questions about either the calculations or the rest of the write-up, either come by my office or ask here in comments.

Here’s a handout that describes the calculation procedure for this experiment:  (It’s the same one that was on your desk when you came in to the lab.)

[CHM 110 Experiment 3B calculation notes]

I recommend that you use your TI-83 calculator or a spreadsheet to find the standard deviation the lab manual asks you to calculate.

Warning:  There’s a possibly confusing typo on page 74 of the 10th edition lab manual.  In the chart in the middle of the page, barium chloride monohydrate is incorrectly given the formula BaCl2.H2O4. The correct formula is BaCl2.H2O

CHM 101 and CHM 110: A lab reminder

[This notice will stay at the top of the page for a few days.  Scroll down for the latest course notes.]

Just a few quick reminders::  You’re expected to come to lab on time each week.  As stated in the syllabus for both CHM 110 and CHM 101 …

Any student arriving to lab more than twenty minutes after the lab’s scheduled start time will be counted absent and will not be allowed to participate in the experiment

Please arrive on time.  If you’re late, you will miss the lab’s safety information and discussion, and I can’t allow you to work.

Also, remember your materials.  You need to bring these to each lab:

  1. Proper attire (long pants and closed-toe shoes – shoes that cover the tops of your feet.  Bring your safely glasses, too,  if you prefer your own pair.
  2. Lab manual
  3. Calculator
  4. Laboratory Notebook (CHM 110 only)

Thanks!