Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Mole Concept
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Question #1: What mass of sodium chloride should you get from the reaction of your sodium bicarbonate?
Data: Objective: To compare the amount of sodium bicarbonate that reacts with hydrochloric acid to the amount of sodium chloride produced and to verify that stoichiometry works-that you can predict the amount of NaCl produced by a specific amount of sodium bicarbonate using the equation: Carbon dioride Water NaCl + CO2 + H₂O Na=1 C=1 H=2 (1=10=3 NaHCO3 + HCl Na= C=C=\ H-₂2 0=3 Procedure: 1) Determine the mass of a clean, dry evaporating dish and watch glass using the digital balance. Make sure your number is recorded to the hundredths place! 2) Weigh out approximately 3 grams of sodium bicarbonate into the dish. Record the mass of the evaporating dish, watch glass and sodium bicarbonate. 3) Answer question #1-use the mass of NaHCO3 (data table #4) and the equation to predict the amount of NaCl that will be produced in your reaction (this should be a mass-mass problem). 4) With a pipet, slowly add approximately 6ml of hydrochloric acid to the dish through the hole between the evaporating dish and the watch glass. Stop adding acid when bubbling ceases; you should now have a clear, colorless solution. 5) Tilt the evaporating dish to be sure all sodium bicarbonate on the sides of the dish has reacted. 6) Place the evaporating dish (with watch glass as cover) on a clay triangle on your ring stand above the Bunsen burner. Heat slowly to keep at a low boil until the solution is completely dry. If spattering occurs, you are heating too quickly. 7) Once completely dry, remove the dish from the clay triangle and wait until it has cooled and determine the mass. 8) Wash evaporating dish and watch glass with water and dry carefully. 1) Mass of evaporating dish 2) Mass of dish, watch glass and NaHCO3 3) Mass of dish, watch glass and NaCl 4) Mass of NaHCO3 5) Mass of NaCl 59.12 60.14 59.838 1.02 B 59.838 g g
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Transcribed Image Text:Data: Objective: To compare the amount of sodium bicarbonate that reacts with hydrochloric acid to the amount of sodium chloride produced and to verify that stoichiometry works-that you can predict the amount of NaCl produced by a specific amount of sodium bicarbonate using the equation: Carbon dioride Water NaCl + CO2 + H₂O Na=1 C=1 H=2 (1=10=3 NaHCO3 + HCl Na= C=C=\ H-₂2 0=3 Procedure: 1) Determine the mass of a clean, dry evaporating dish and watch glass using the digital balance. Make sure your number is recorded to the hundredths place! 2) Weigh out approximately 3 grams of sodium bicarbonate into the dish. Record the mass of the evaporating dish, watch glass and sodium bicarbonate. 3) Answer question #1-use the mass of NaHCO3 (data table #4) and the equation to predict the amount of NaCl that will be produced in your reaction (this should be a mass-mass problem). 4) With a pipet, slowly add approximately 6ml of hydrochloric acid to the dish through the hole between the evaporating dish and the watch glass. Stop adding acid when bubbling ceases; you should now have a clear, colorless solution. 5) Tilt the evaporating dish to be sure all sodium bicarbonate on the sides of the dish has reacted. 6) Place the evaporating dish (with watch glass as cover) on a clay triangle on your ring stand above the Bunsen burner. Heat slowly to keep at a low boil until the solution is completely dry. If spattering occurs, you are heating too quickly. 7) Once completely dry, remove the dish from the clay triangle and wait until it has cooled and determine the mass. 8) Wash evaporating dish and watch glass with water and dry carefully. 1) Mass of evaporating dish 2) Mass of dish, watch glass and NaHCO3 3) Mass of dish, watch glass and NaCl 4) Mass of NaHCO3 5) Mass of NaCl 59.12 60.14 59.838 1.02 B 59.838 g g
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