Chemistry Experiment Essay

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Materials Materials From: Label or Box/ Bag: Qty Item Description Student Provided 1 Matches 1 Toothpicks (or wooden splints) 1 Pie tin or similar 1 Marker pen 1 Household white vinegar 1 3% Hydrogen peroxide (H2O2) 1 Measuring spoons 1 Drinking straw 1 Tissue paper 1 Baking soda (sodium bicarbonate) From LabPaq 1 Goggles-Safety 1 Test Tube(5), 13 x 100 mm in Bubble Bag 1 Well-Plate-24 Auxiliary Supplies Bag Auxiliary Supplies Bag- CK1 1 Gas Assembly; copper/plastic tubing in #00 stopper 1 Pipet, Empty Short Stem 1 Rubber stopper, #00, 1 hole, Pipet tip w/plastic gas delivery tube Experiment Bag Properties of Gases 2 Alka Seltzer® (1/4 tablet) in Bag 2" x 3" 1 Bromthymol Blue, 0.04% - 4 mL in Pipet 1 Hydrochloric Acid, 2 M - 20 mL in Dropper Bottle 1 Limewater (Calcium Hydroxide, Saturated) - 6 mL in Pipet 1 Manganese Metal Pieces - 4-6 Pieces in Bag 2" x 3" 3 Pipet Bulbs, Wide-Neck with 1/4" Stem 1 Zinc, Mossy - 4-6 Pieces in Bag 2" x 3" Note: The packaging and/or materials in this LabPaq may differ slightly from that which is listed above. For an exact listing of materials, refer to the Contents List form included in the LabPaq. www.LabPaq.com 57 ©Hands-On Labs, Inc. Experiment Properties of Gases Discussion and Review Several gases are produced frequently in the laboratory and it is important to be able to identify them by their physical and chemical properties. The gases under investigation are hydrogen (H2), oxygen (O2), and carbon dioxide (CO2). These gases will be generated using small-scale techniques and carrying out the following reactions: Hydrogen (H2) Mg + 2HCl → MgCl2 + H2 or Zn + 2HCl → ZnCl2 + H2 Oxygen (O2) 2 H2O2 (Catalyst MnO2) → 2 H2O + O2 Carbon Dioxide (CO2) NaHCO3 + 2 HCl → NaCl + H2O + CO2 Figure 1: Procedure Before beginning, set up a data table similar to the Data Table: Experiment
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