Experiment 9: Enthalpy of Formation of Magnesium Oxide
Wear safety glasses at all times
Wear gloves at all times
Note Use Logger Pro to record data from the experiment through temperature probes (the
temperature probe has an unc
Experiment 8: Determining the Mass % Composition of Aqueous Hydrogen Peroxide Solution
1) Work in pairs
2) Sign out three 25x150 mm test tubes. Clean the test tubes, shake out any water and allow them
to dry as much as possible.
3) The dowel h
Experiment 6 - Spectrophotometric Determination of Iron in a Vitamin Tablet
Objective: To use the quantitative technique of spectrophotometry to determine the mass (g) of
iron contained in a commercially available vitamin tablet. The tablets contain iro
Experiment 5 Studying Chemical Reactions
Part A Determining the Solubility Rules
Objective To determine the solubility rules for cations and anions by carrying out a series of
chemical reactions and observing the changes that take place.
Part B Determin
Experiment 4 Synthesis of Alum from Scrap Aluminum
Objective To produce aluminum salt from aluminum metal; thus produce alum, KAl(SO42-)2 *
12 H2O (s), from aluminum cans.
Procedure Synthesis of alum
Make sure to wear safety glasses at all times.
Experiment 3: Determining the Empirical Formula of Copper Chloride
1. Use a buret to dispense 25.00 mL of copper chloride directly into a 250 mL beaker.
Record the initial and final buret readings (use the exact buret volume reading).
What Is It? Identifying an Unknown Compound
You will perform a number of tests and observations on your unknown substances in
order to characterize and label them.
Observations of the compounds physical appearance:
Record what you can see, note everything
-Diethyl ether is highly volatile and flammable and gives off a distinct smell. It is
soluble in water
-Eugenol has a clove like aroma, looks like a yellow oil, not dangerous. Contained in
nutmeg, cinnamon, cloves, basil, and bay leaves.
Experiment 2- Melting Points and the Identification of an Unknown and Cholesterol from
Part I. Melting Points and the Identification of an Unknown
1. place .5 grams of an unknown in a test tube or vial
2. Crush a part of the solid with a
Experiment 5- Column Chromatography
-Hexane is flammable
-Make sure the stopcock is not loose in the Williamson microscale column
-DO NOT allow the level of hexane to drop below the top of the alumina
-Do not ever let the column run dry
Experiment 9-Dehydration of Methylcyclohexanols
Mass and Volume of 150mmol of methlcyclohexanol
150mmol=.150mol X 114.2 g/mol (molecular weight of methylcyclohexanol)
=17.13 g = 17.13 mL methlcyclohexanol
Theoretical Yield of Methycyclohexenes (1:1 soluti
-Sulfuryl chloride is corrosive and reacts violently with water. Use only in a fume hood
and avoid contact. Wear gloves.
-Avoid contact of 2,2'-azobis-(2-methyl-propionitrile) with acetone or acetone vapors
-a gas trap will be used because sulfu