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A student uses a burette as the one shown here. They recorded the initial reading of the burette as 7.65 mL. The student opened the stopcock to deliver the solution into one of his samples and when they closed the stopcock and took the final reading in the burette, they read 15.75 mL. What volume of solution was delivered? The solution in the burette was 0.325 M NaOH. How many moles of NaOH were delivered? How many millimoles? EDURE:

A student uses a burette as the one shown here. They recorded the initial reading of the burette as 7.65 mL. The student opened the stopcock to deliver the solution into one of his samples and when they closed the stopcock and took the final reading in the burette, they read 15.75 mL. What volume of solution was delivered? The solution in the burette was 0.325 M NaOH. How many moles of NaOH were delivered? How many millimoles? EDURE:

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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What formula do I use/ how do I solve number 3 in the attached photo
1. 3. 4. 2. 5. 6. 7. Balanced tubes must be placed at opposite side inside the test tube Never insert a tube without placing a second one on the opposite side. Check that the top of the tubes does not touch each other to avoid rupture of the glass and flying particles of glass. It is important that you wear safety goggles while operating a centrifuge. Turn it on for about 1-2 minutes and then turn it off. Wait till the centrifuge completely stops rotating before removing your tubes from it. PRELAB ASSIGNMENT For the reaction that represents the formation of water: 2 H2 (g) + O2 (g) → 2H₂O based on the moles of each reactant present in each tube, identify what substance is limiting reagent and predict the maximum moles of water that can form. In which test tube will the largest quantity of water be obtained? Tube Number 1 2 3 4 Moles H₂ 0.20 0.40 0.60 0.80 Moles O₂ 0.80 0.60 0.40 0.20 Moles H₂O 2. A student uses a burette as the one shown here. They recorded the initial reading of the burette as 7.65 mL. The student opened the stopcock to deliver the solution into one of his samples and when they closed the stopcock and took the final reading in the burette, they read 15.75 mL. What volume of solution was delivered? 3. The solution in the burette was 0.325 M NaOH. How many moles of NaOH were delivered? How many millimoles? PROCEDURE: 8 9 10 11 12 13 14 You will be working by yourself in this experiment using Kim's recommendations. The solutions Kim used were 0.600 M BaCl2 and 0.600 M (NH4)2HPO4. Kim recommended to prepare a series of six solutions in which the quantity of each reactant varies but the total volume of both remains constant. She suggested to place the solutions in medium size Pyrex test tubes where the reaction will occur. It is important to use Pyrex glassware to minimize chances of breakage. Where to prepare the mixtures? The goal is to isolate and record the mass of solid formed in the reaction. As the solid would form in the test tube, it is important to cload label the test tubes and record the mass of each test tube prior to beginning the experiment table format to keep your data as the one shown 15
Transcribed Image Text:1. 3. 4. 2. 5. 6. 7. Balanced tubes must be placed at opposite side inside the test tube Never insert a tube without placing a second one on the opposite side. Check that the top of the tubes does not touch each other to avoid rupture of the glass and flying particles of glass. It is important that you wear safety goggles while operating a centrifuge. Turn it on for about 1-2 minutes and then turn it off. Wait till the centrifuge completely stops rotating before removing your tubes from it. PRELAB ASSIGNMENT For the reaction that represents the formation of water: 2 H2 (g) + O2 (g) → 2H₂O based on the moles of each reactant present in each tube, identify what substance is limiting reagent and predict the maximum moles of water that can form. In which test tube will the largest quantity of water be obtained? Tube Number 1 2 3 4 Moles H₂ 0.20 0.40 0.60 0.80 Moles O₂ 0.80 0.60 0.40 0.20 Moles H₂O 2. A student uses a burette as the one shown here. They recorded the initial reading of the burette as 7.65 mL. The student opened the stopcock to deliver the solution into one of his samples and when they closed the stopcock and took the final reading in the burette, they read 15.75 mL. What volume of solution was delivered? 3. The solution in the burette was 0.325 M NaOH. How many moles of NaOH were delivered? How many millimoles? PROCEDURE: 8 9 10 11 12 13 14 You will be working by yourself in this experiment using Kim's recommendations. The solutions Kim used were 0.600 M BaCl2 and 0.600 M (NH4)2HPO4. Kim recommended to prepare a series of six solutions in which the quantity of each reactant varies but the total volume of both remains constant. She suggested to place the solutions in medium size Pyrex test tubes where the reaction will occur. It is important to use Pyrex glassware to minimize chances of breakage. Where to prepare the mixtures? The goal is to isolate and record the mass of solid formed in the reaction. As the solid would form in the test tube, it is important to cload label the test tubes and record the mass of each test tube prior to beginning the experiment table format to keep your data as the one shown 15
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