Lab Schedule 102 Sp 97

Chemistry 102 Lab Schedule

Spring 1997 Dr. Zellmer

Text: Skoog, West and Holler, Fundamentals of Analytical Chemistry, 7th Edition, plus handouts.

Important: Check the Chemistry 102 Lab Notes for additional details on these experiments.

This schedule is for MW 2-5 labs and TuTh 2-5 labs

Periods Begin

1
M 1/27
Tu 1/28
1. Check in, balance instruction. Weigh the same weighing bottle on all ten electronic balances and record the results on the posted form.
3
W 1/29
Th 1/30
2. Gravimetric Determination of Chloride in a Soluble Sample. Method 36A, p. 814-816. Let ppt stand overnight instead of heating. Do exp. 3 during any free time--e.g. drying.
1
with (2.)
3. Calibrate Glassware (Section 35I on pp. 806-808.) Do two pipets, one vol flask, and your buret. Use free time during exp. 2.
3
W 2/12
Th 2/13
4. Determination of Chloride by the Fajans method and by Potentiometry. See Absorption Indicator Method 36C-1 and 36C-2 on pp. 827-828. Standardize AgNO₃ vs. NaCl standard. One titration will use a potentiometric end point with 1 mmole of KI and 2 mmole of NaCl standard, followed by computer analysis. See the Handout on Grans analysis and the Lab Notes.
4
W 2/26
Th 2/27
5. Determination of Sodium Carbonate in an Impure Sample. Method 36B-10, p. 824. Computer end point methods on handout. Run replicates with indicator for unk value, then run one sample with a pH meter and use computer methods to analyze the end points.
3
W 3/12
Th 3/13
6. Complexometric Determination of Calcium by EDTA titration. Methods under 36D, pp. 830-832--these will need modification. Solid unknown--see Lab Notes for sample prep, standardize EDTA vs. CaCO₃, report %CaO
4
M 3/31
Tu 4/1
7. Determination of Fe in Ore by Spectrophotometry and Atomic Absorption. Based on Method 36M-2, pp. 859-860. You will need to find the methods for dissolving Fe ore to get an aqueous sample. Look at 36E-4, p. 836. New concentrations will be required for Atomic Absorption. This will require some planning by the student.
4
M 4/14
Tu 4/15
8. Redox Determination of Glucose. Method in Lab Notes. There is some messy chemistry here. Plan this experiment carefully.
4
M 4/28
Tu 4/29
9. Quantitative Analysis by Ion Exchange (Section 36P, p. 866), Gas Chromatography (36Q, p. 868) or HPLC*

*Other experiments in Separations or Ion Selective Electrodes may need to be substituted for the GLC/HPLC analysis if instrumentation is limited.
1
M 5/12
Tu 5/13
10. Finish Up and Check Out.
1
W 5/14

11. Check out of lab. No experimental work on this day. Lab will be closed on Thursday because of Faculty Consultation Days.
See the handout on "The 102 Laboratory Notes" for additional details on these experiments, laboratory notebook organization, and report formats. Results (if not a full written report) are due the Tuesday following the experiment. Written reports are due one week after the completion date. Each experiment is worth 100 points unless otherwise specified. Notebook clarity and organization is worth 10 points on selected experiments. A late penalty of 5 points per period may be assessed at the discretion of the instructor. Recalculation of an unknown result, or a reissue of an unknown due to improper sample management will cost 20 points. The minimum grade for a completed 100 pt experiment is 30 points.

1	M 1/27 Tu 1/28	1. Check in, balance instruction. Weigh the same weighing bottle on all ten electronic balances and record the results on the posted form.
3	W 1/29 Th 1/30	2. Gravimetric Determination of Chloride in a Soluble Sample. Method 36A, p. 814-816. Let ppt stand overnight instead of heating. Do exp. 3 during any free time--e.g. drying.
1	with (2.)	3. Calibrate Glassware (Section 35I on pp. 806-808.) Do two pipets, one vol flask, and your buret. Use free time during exp. 2.
3	W 2/12 Th 2/13	4. Determination of Chloride by the Fajans method and by Potentiometry. See Absorption Indicator Method 36C-1 and 36C-2 on pp. 827-828. Standardize AgNO₃ vs. NaCl standard. One titration will use a potentiometric end point with 1 mmole of KI and 2 mmole of NaCl standard, followed by computer analysis. See the Handout on Grans analysis and the Lab Notes.
4	W 2/26 Th 2/27	5. Determination of Sodium Carbonate in an Impure Sample. Method 36B-10, p. 824. Computer end point methods on handout. Run replicates with indicator for unk value, then run one sample with a pH meter and use computer methods to analyze the end points.
3	W 3/12 Th 3/13	6. Complexometric Determination of Calcium by EDTA titration. Methods under 36D, pp. 830-832--these will need modification. Solid unknown--see Lab Notes for sample prep, standardize EDTA vs. CaCO₃, report %CaO
4	M 3/31 Tu 4/1	7. Determination of Fe in Ore by Spectrophotometry and Atomic Absorption. Based on Method 36M-2, pp. 859-860. You will need to find the methods for dissolving Fe ore to get an aqueous sample. Look at 36E-4, p. 836. New concentrations will be required for Atomic Absorption. This will require some planning by the student.
4	M 4/14 Tu 4/15	8. Redox Determination of Glucose. Method in Lab Notes. There is some messy chemistry here. Plan this experiment carefully.
4	M 4/28 Tu 4/29	9. Quantitative Analysis by Ion Exchange (Section 36P, p. 866), Gas Chromatography (36Q, p. 868) or HPLC* *Other experiments in Separations or Ion Selective Electrodes may need to be substituted for the GLC/HPLC analysis if instrumentation is limited.
1	M 5/12 Tu 5/13	10. Finish Up and Check Out.
1	W 5/14	11. Check out of lab. No experimental work on this day. Lab will be closed on Thursday because of Faculty Consultation Days.