LABORATORY 8

Chemstry 160
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LABORATORY 4 - Evaluating Commercial Antacids (ANAL 478)

PRE-LABORATORY ASSIGNMENT: Complete and turn in the Pre-Laboratory Assignment from the module. You may bring your own antacid tablets to lab for analysis or use the ones provided. If you bring your own tablets, you need to know the price of the package and the number of tablets in the package.
EQUIPMENT: Check out a 50 mL analytical buret for the titrations. (Rinse the buret thoroughly at least three times with distilled water before returning it at the end of the day.)
Check out one 25 mL pipet and additional 250 mL beakers and 250 mL Erlenmeyer flasks to give you a total of three each.
PROCEDURE: Follow the procedure in the modular laboratory. Turn in the Report Sheet from the modular laboratory to your Teaching Assistant.
LOOKING AHEAD: The next laboratory gives you the option of bringing your own samples. You should read the Pre-Laboratory Assignment section in the next lab before leaving in case you want to exercise this option. Also, in your spare moments during this and the next Lab, you should start drying your crucibles to constant weight for Laboratory 6 (see that module for the procedure). This process can take up to two weeks.

LABORATORY 5 - Evaluating the Calcium Ion Content of Commercial Dried Milk Powders (ANAL 347)

PRE-LABORATORY ASSIGNMENT: Complete and turn in the Pre-Laboratory Assignment from the module. You may bring your own milk powder to the lab or use the powders provided. If you bring your own powder, you need to know the price and weight of the package.
EQUIPMENT: Check out a 50 mL analytical buret for the titrations. (Rinse the buret thoroughly at least three times with distilled water before returning it at the end of the day.)
Check out one weighing bottle and additional 250 mL Erlenmeyer flasks to give you a total of three. You may also need to check out a 10 mL or a 100 mL graduated cylinder, if you do not have one in your lab drawer already.
PROCEDURE: Follow the procedure in the modular laboratory. Turn in the Report Sheet from the modular laboratory to your Teaching Assistant.

LABORATORY 6 - Gravimetric Determination Of Sulfate (ANAL 356)

PRE-LABORATORY ASSIGNMENT: Read the TECH 316 module Complete and turn in the Pre-Laboratory Assignment from the ANAL 356 module.
EQUIPMENT: Check out one weighing bottle, one graduated 10 mL pipet, and additional 400 mL beakers to give you a total of four. You may also need to check out a 10 mL or a 100 mL graduated cylinder, if you do not have one in your lab drawer already. The Whatman No. 40 filter paper will be supplied in the laboratory. You will share one of the several dessicators in the lab for drying your samples, so label your samples with your name or initials.
PROCEDURE: Follow the procedure in the modular laboratory. Turn in the Report Sheet from the modular laboratory to your Teaching Assistant.

LABORATORY 7 - Introducing Graphing Techniques (MISC 371)

There is no pre-laboratory assignment for this "dry" laboratory. Read the introductory material in the laboratory module. Remember to bring your calculator and a ruler to the laboratory. You may do this laboratory exercise before the laboratory is scheduled to meet and turn it in at the beginning of the laboratory period if you do not need assistance from your Teaching Assistant in doing the exercise.
PROCEDURE: Follow the procedure in the modular laboratory. Turn in answers to the Exercises and the completed graphs from the modular laboratory to your Teaching Assistant.
LOOKING AHEAD: The next laboratory gives you the option of bringing your own samples. You should read the Pre-Laboratory Assignment section in the next laboratory before leaving in case you want to exercise this option.

LABORATORY 8 - Determining Aluminum(III) Concentration In Natural Water (ANAL 322)

PRE-LABORATORY ASSIGNMENT: Read the material in TECH 338 "Laboratory Techniques: Visible Absorption Measurements". Complete and turn in the Pre-Laboratory Assignment from the ANAL 322 module. You may follow the sampling procedure in Part I of the module if you wish to bring in your own samples, or you can use the samples provided. Obtain a Nalgene sample bottle from your Teaching Assistant.
EQUIPMENT: Check out one each of 5 mL, 10 mL, and 25 mL volumetric pipets. (A graduated pipet may be substituted for the 5 mL and/or 10 mL volumetric pipets.) Check out one each of 50 mL and 100 mL volumetric flasks. Check out additional 50 mL beakers to give you a total of four. You may also need to check out a 10 mL graduated cylinder, if you do not have one in your lab drawer already. You will share use of the spectrometers and spectrometer cells.
PROCEDURE: Follow the procedure in the modular laboratory. Turn in the Report Sheet from the modular laboratory to your Teaching Assistant.

LABORATORY 9 Determining an Equilibrium Constant Using Spectrophotometry (EQUL 343)

PRE-LABORATORY ASSIGNMENT: Complete and turn in the Pre-Laboratory Assignment from the module.
EQUIPMENT: Check out one each of 1 mL, 10 mL, and 25 mL volumetric pipets. (A graduated pipet may be substituted for the 1 mL and/or 10 mL volumetric pipets.) Check out one each of 25 mL, 50 mL, and 100 mL Erlenmeyer flasks, and one 100 mL volumetric flask.
PROCEDURE: Follow the procedure in the modular laboratory. Turn in the Report Sheet from the modular laboratory to your Teaching Assistant.

LABORATORY 10 - Paper Chromatography of Selected Transition-Metal Cations (ANAL 373)

PRE-LABORATORY ASSIGNMENT: Complete and turn in the Pre-Laboratory Assignment from the module.
EQUIPMENT: The plastic wrap, rubber bands, filter paper and chromatographic paper will be supplied. Rather than 11x14 cm sheets, your Teaching Assistant will cut you two 14 cm long sections from a 10 cm wide roll of paper. You will share the use of the hot plates.
PROCEDURE: Follow the procedure in the modular laboratory. Turn in the Report Sheet from the modular laboratory to your Teaching Assistant.

Friday, October 03, 2003