LAB 04: Physical and Chemical Properties Collette J. Taylor CHM1025c-4322 October 12, 2019 “The purpose of this experiment is to determine the melting and boiling point of a compound, to determine whether a solid or liquid is soluble or insoluble in water, and to distinguish between physical and chemical change, and whether an element is metal or nonmetal.”
Title: LAB 04: Physical and Chemical Properties Material: - Ring stand - Boiling chips - 400 ml beaker - Small test tube - Split stopper - methyl alcohol - Test tube rack - test tube holder - Crucible tongs - Amyl alcohol - 250 ml beaker - Copper (II) sulfate crystals - Evaporating dish - Calcium carbonate crystals - Potassium bicarbonate crystals - Ammonium bicarbonate crystals - 0.5 m sodium carbonate solution - copper wire - M sodium sulfate solution - Wire gauze - 6 M HCI - M calcium nitrate solution - M copper (II) nitrate solution - 6 M ammonium hydroxide solution - small vials with samples of copper, hydrogen, magnesium, manganese , neon, oxygen, silicon, sulfur, tin, zinc Procedure and Apparatus: 1. Physical Properties a. Physical State and Color Vials of Copper, Magnesium, Manganese, Neon, Silicon, Tin, Hydrogen, Oxygen, Sulfur, Zinc. The state and color were observed of each vial and was recorded in the data table, as can be seen in fig. 1. b. Boiling Point We placed a 400 ml beaker on a hot plate and add about 300 mL of distilled water to the beaker, in which we allow to come to boiling. Prepare the medium to large size test tube. Clamp the test tube and utility clamp assembly onto a ring stand. Add about 20 drops of methyl alcohol and boiling chip to the test tube and then place into the hot water. Place the thermometer about 1 cm into the test tube above the liquid. Record boiling point temperature once alcohol begins to boil, and alcohol drops from the tip of the thermometer every 2 to 3 seconds.
c. Solubility of a solid in water Add 20 drops of distilled water into two test tubes. Drop a copper sulfate crystal into one test tube, and calcium carbonate into the other test tube. Shake test tube and observe if solids are soluble or insoluble. d. Solubility of a liquid in water Add 20 drops of distilled water into two test tubes. Then add a few drops of methyl alcohol into one test tube and add a few drops of amyl alcohol into the other test tube.
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- Fall '19