NEWS PAGE

 

1. PHSC 102--------- We will continue to cover energy in Chapter 15 of Hill.

2. CLAB 123-------

Please be prepared for experiment 10. You should read the introductory material and the procedure in your lab manual (or modification if applicable). Be sure to prepare an outline (summary) of the procedure in your notebook. Remember to bring your lab manual and notebook to class and wear proper lab attire. Please also bring a calculator (does not need to be scientific). Please study the link on the class web page for Common Laboratory Operations and Apparatus.

Your lab reports for experiment 9 will be due.

Please read Part II of the Information Sheet before starting the report. Remember that all calculations are to include units and are to be to the proper number of significant digits. Multiple pages must be stapled. Please see the report instructions available as a link on the Information Sheet.

Experiment 9 instructions.

It will be easiest if you write the report as though there were two separate reports.

Copper product:

Raw data:
Construct a table with mass of empty flask, mass of flask with hydrate, mass of Fe, mass of flask plus Cu, for each of the three runs.

Sample calcs.:
All of the calculations that I did on the board for one run.

Results:
Construct a table with theoretical yield, indicate limiting reagent, and % yield, for each of the three runs.

Discussion:
Discuss your % yield (is it reasonable).

Sodium chloride product:

Raw data:
Construct a table with mass of empty flask, mass of flask with sodium carbonate, mass of flask with NaCl, for each of the three runs.

Sample calcs.:
All of the calculations that I did on the board for one run.

Results:
Construct a table with theoretical yield and % yield, for each of the three runs.

Discussion:
Discuss your % yield (is it reasonable).

Note: Do not insert the tables from your lab manual. Do not average results.

Experiment 10 instructions.

Unknown number (by names)

Raw data:
Room temp., Barometric pressure, Make a table - for each run give the mass of sample and the volume of water

Sample calcs.:
All the calculations that I did on the board.

Results:
Make a table for % sodium bicarbonate for each run and the avergae of the best runs.

Discussion:
Are your results precise and reasonable.