1)What are the boiling points of your reaction products and the solvent they will be dissolved in? [Consult a reference book like the CRC Handbook of Physics & Chemistry, or use the internet; in either case, list your source.] Explain why this information is critical to the design of this experiment.
2)How can you conclude the reaction is complete?
Experiment Summary Procedure This experiment has two guals: 1. In observe and identify a few chernical reactions and correlate them with the balanced Part 1. Solubility testing chernical equations; and Measure 0.5 grams of each of the solules: sugar, salt and baking soda (Jhserve the initial 2. In learn about the concepts ol conservation of mass and stoichiometry ol reactions. appearance of each one and place each ol'them separately into I(10 ml. heakers, Add 10.0 ml. of In Part 1 of the experiment, you will explore the solubilities of some common household solutes. tap water into each of the beakers containing the solutes. Observe what happens between cach solate and water. Record your observations in Table 1 of the laboratory report In Part 2, you will prepare calcium acetate and determine if the reaction follows the law of conservation of mass. To each beaker containing the dissolved solutes, add 2.0 ml. of vinegar, Observe what happens as you add the vinegar. Record this in Table 1 of the laboratory report. Calcium acetate is prepared from mixing calcium carbonate and acetic acid. The product should be weighed out once the reaction is completed. It should then be left in a well-ventilated place Clean-up: Dispose of your solutions in the sink while running a slow stream of water from the for several days in air dry and then he weighed out once again. Lap. Wash your beakers for use in the next step. Part 2. Synthesis of calcium acctate Prelaboratory Assignment 1. Weigh the clean, dry 100 mL beaker to the nearest milligram and record it in Table 2a. 2. Prepare your calcium carbonate source: Read the procedure and answer the prelaboratory questions before performing the experiment. If using Tums tablets: crush one Ultra Strength (1000 mg ol' calcium carbonate on the Submit the answer on Moodle and receive the approval from your demonstrator before label) between 2 spoons or in a mortar and pestle into a line powder close to the texture proceeding. If you have any questions regarding the procedure, contact your demonstrators of cornstarch. Use all of the crushed powder of one tablet. before proceeding to the experiments. If using eggshell: wash the shell from half an egg with plenty of water. Peel off the shell membrane to the best of your ability. Let it air dry until it is not moist when touched Materials (several hours). Crush the eggshell between 2 spoons or in a mortar or pestle into a fine powder with grain sizes similar to fine salt. Userweigh between 0.5 g to 1.0 of the Apparatus crushed eggshell safely glasses & lah coats 3. Transfer your chosen source of calcium carbonate with a spatula into a pro-weighed balance beaker. Measure both the mass of the empty beaker and the beaker with calcium spatula carbonate to the nearest milligram and record it on your data sheet (Table 2a). 3 x 100 ml. beaker 4. Weigh the clean, dry 25 ml graduated cylinder to the nearest milligram and record it an graduated cylinder your data sheet. Beral plastic pipet plastic stirring rod 5. Measure out 25 mL of either the 576 or 10%% acctic acid with the 25 mL graduated 2 spoons or mortar and pestle cylinder using the technique you learned in Experiment 1. Record the mass to the nearest milligram and record it on your data sheet. Materials 6. Add the acctic acid slowly into the beaker with calcium carbonate. Make observations of calcium carbonate (Turns) or egg shells (prepare ahead of time: see Part 2 the reaction. Using the stirring rod, mix the contents of the beaker frequently. It is critical stop 21 In not spill any liquid during the transfer and mixing. Otherwise, your results will not be 10% or 8% acetic acid (vinegar solution) accurate. sugar (sucrose) 7. Based on the answer of your pre-laboratory question when your reaction is considered table salt (sodium chloride) completed, weigh the reaction mixture, including the beaker, to the nearest milligram and baking soda (sodium bicarbonate ) record the mass on your data sheet
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