NEWS PAGE

 

1. CHEM 101---------Please read along in your textbook and practice working problems as the information is completed in lecture. We will be covering material in chapter 11 of your text.

Chapter 2 - Example 2.8-2.11, 2.18- 2.25, 2.27, Questions 1, 5, 15, Problems 31, 33, 35, 45, 51, 57, 61, 69, 75
Chapter 3 - Example 3.1, 3.3
Chapter 4 - Example 4.7, 4.12
Chapter 6 - Example 6.1 - 6.4, 6.10, 6.11, 6.12, 6.13
Chapter 5 - Example 5.5 - 5.9, 5.20, 5.23, 5.25
Chapter 7 - Example 7.1, 7.2, 7.4, 7.5
Chapter 8 - Example 8.1 - 8.6, 8.9, 8.10 (Test 1 after completion)

New practice problems have been assigned:

Chapter 11 - Example 11.1 - 11. 9, 11.11, 11.15 - 11.17, Problems 23, 25, 31, 51, 59, 75, 77, 125 (Test 2 after completion)

NOT YET:

Chapter 12 - Exercises: Questions 5, 6, 8, 9, 13, 15, 27, 29, 31 -- Problems 35, 45
Chapter 9 - Example 9.1, 9.2(a,b), 9.13(a,b), Skill Builder 9.1, Questions 3, 13, Problems 31, 54, 49c, 57c
Chapter 10 - Example 10.2, 10.4, 10.5, Skill Builder 10.2, Questions 3, 7, 17, 19, 21, Problems 45, 47(c,d), 49(a,d)

2. CLAB 123-------Please be prepared for experiment 6.

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. This is a tough experiment so be prepared to work. 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 6 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.

Report 6 instructions.

You should prepare the report as though you were making 3 reports (one on each gas law).

For Boyle's law, include your graph and discuss the line fit by citing the correlation coefficient.

For Gay-Lussac's Law

I. Raw Data- Barometric pressure, h1, h2, t1, t2.
II. Sample Calcs.- Show all calculations.
III. Results- P/T ratios.
IV. Discussion- discuss how close the ratios are to each other.

For Charles' Law

I. Raw Data- V1, Volume of water "sucked in", t1, t2.
II. Sample Calcs.- Show all calculations.
III. Results- V/T ratios.
IV. Discussion- discuss how close the ratios are to each other.

3. CLAB 124-------Please be prepared for experiment 9 (Separation Techniques).

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 report for experiment 5 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.

Lab report experiment 5 instructions.
I               Raw data – Table of volumes and temperatures for the 3 runs
II             Sample calcs. – Three graphs from Logger Pro for room temp.  Show line fit and equation of line for one graph only that is nearest to straight line.  Two additional graphs (one for low and one for high temp.) with line fit and equation.  The order should not change with temp. There will be a total of 5 graphs.  Mark the temperature on each one.
Show calculation of “k” for each temperature (pseudo rate law constant).
III            Give order of reaction.  Make table of “k” values, one for each temperature.
IV            Discuss the effect of temperature relative to the rule of thumb.  Discuss any concerns or errors.

Lab report experiment 6 instructions.

It will be easiest to do the report in 3 separate sections A, B, C as though there were three reports (but one submittal).

A. Chrom.- Raw data: list the stationary phase and mobile phase for thin layer. Give distance traveled by solvent, blue dye and red dye.
List the stationary and mobile phases for the column. Samp calcs.: calculate Rf for red and blue dyes. Results: Rf values. Discussion: Describe what you saw.

B. Cations- Raw data: Give your observations for each step. Samp calcs.: Give balanced equations for all reactions Results: List cations found. Discussion: describe the 3 test tubes that were checked.

C. Ion Exchange- Raw data: Give volumes, mass, concentrations. Samp calcs.: Show equation placed on board. Results: % efficiency Discussion: Discuss result.