PR OCEDURE Before beginning‚ set up a data table similar to the Data Table: Experiment Results in the Lab Report Assistant section. This experiment will create a reaction of sodium carbonate and calcium chloride dihydrate to produce a precipitate of calcium carbonate. This formula is: Na2CO3(aq) + CaCl2. 2H2O(aq) à CaCO3(s) + 2NaCl(aq) + 2H2O 1. Put on your goggles. 2. Weigh out 1.0 g of CaCl2·2H2O and put it into the 100-mL beaker. Add 25 mL of distilled water and stir to form the calcium
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Materials Student Provides: Distilled Water 2 Clean Sheets of Paper 1 Paper Towel 1 Pair of Scissors LabPaq Provides: 1 Digital Scale 1 50 mL Plastic Graduated Cylinder 1 Pair of Safety Goggles 1 Spatula 6 Test Tubes‚ 13 x 100 mm in Bubble Bag 1 Test Tube Rack‚ 6 x 13 mm 1 Dual Magnifier 1 Rubber Stopper 1 Marking Pencil 1 Test Tube
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morphology was examined by observing both stained and unstained organisms. A wet mount is a preparation process where a live specimen in culture fluid is placed on a slide and the organism is free to move about. In the wet mount slides provided via LabPaq software with cheek‚ dental plaque‚ and yeast specimens were observed. The wet mount preparations were difficult to observe because of poor contrast‚ however‚ a common occurrence in the specimens were cells large in size and translucent in color
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Physical and chemical ProPerties Physical and Chemical Properties Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Substance Name Mg Cu Zn
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during the procedure. It was possible to distinguish between physical and chemical changes using scientific observations. Experiment and Observation Please note that this procedure was adapted from the “Observation of Chemical and Physical Changes” LabPaq Lab manual (Hands-On Labs Version 42-01-82-00-03‚ 2015) Table 1 Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 (Sodium Bicarbonate) HCl (Hydrochloric Acid) Bubbles‚ no change in color‚ clear‚ Y A2 NaOCl
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Name: Exp 9: Stoichiometry of a Precipitation Reaction Data Tables: Step 3: Show the calculation of the needed amount of Na2CO3 CaCl2.H2O(aq)= m/M =1/147 =0.0068 mol CaCO3(s)=0.0068*1/1 =0.0068 mol CaCO3 (s)= CaCO3 mol *CaCO3 g =0.0068 mol*100.01 g =0.68 g Convert moles of Na-2CO3 to grams of Na2CO3 = 0.00680 moles Na-2CO3 x 105.99g Na-2CO3 1 mole Na-2CO3 = 0.72g 0.72g of Na-2CO3 to fully react with 1g of CaCl2-.2H2O Step 4: Mass of weighing dish
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References: ACID_BASE INDICATORS. (n.d.). ChemLib. Retrieved May 27‚ 2013‚ from http://www.ch.ic.ac.uk/vchemlib/course/indi/indicator.html LabPaq. A Laboratory Manual of Small-Scale Experiments for the Independent Study of General College Chemistry. (2013). Englewood: Hands-On Labs‚ Inc..
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References: 1. Hands-on Labs‚ Inc. LabPaQ CK-College General Chemistry. Observation of Chemical Changes. Pgs 15-20. Englewood‚ CO. USA.
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Keith Shearer Lab Group 3 January 19‚ 2015 Objective Is to measure various food items and become familiar with different energy units like calories and joules. Also‚ we will be using simple household products and follow the standard safety procedures of this lab. Materials Procedure First‚ use a digital scale to determine the empty weight of the 100ml beaker. The‚ you are going to fill the beaker half way with water (approximately 50ml) and weigh it again. Take the water and beaker weight
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to identify them. Materials: Matches Toothpicks Pie tin Marker White Vinegar Hydrogen peroxide Measuring spoons Straw Tissue paper Baking soda Test tubes 24 Well Plate Pipet Stoppers for the test tube Chemicals provided by Labpaq Procedure: Place a piece of mossy zinc in the test tube that contains diluted HCl. Cap the tube with the stopper that has the gas delivery tube through the center of it. Stand it up straight in the well plate‚ using the tissue paper if necessary
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