Experiment 16-Pre-Lab Assignment Name: 1. Design a preliminary procedure including sample calculations to determine the heat of neutralization for the reaction between 1.0 M HCl and 1.0 M NAOH in kJ/mol. Use your knowledge of the chemicals, their properties, and the laboratory techniques learned thus far in this course. Any chemicals and equipment that you require will be provided in the lab. This procedure must be approved by your instructor before you can begin experimentation. unpe 16-3

Experiment 16-Pre-Lab Assignment Name: 1. Design a preliminary procedure including sample calculations to determine the heat of neutralization for the reaction between 1.0 M HCl and 1.0 M NAOH in kJ/mol. Use your knowledge of the chemicals, their properties, and the laboratory techniques learned thus far in this course. Any chemicals and equipment that you require will be provided in the lab. This procedure must be approved by your instructor before you can begin experimentation. unpe 16-3

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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Provide the balanced reaction for this experiment? a piece of weigh paper (or weigh boat) and tare it out on the balance. Weigh out between 1.000 to 1.200 g of KHP. Record the exact mass in your data table for Trial 1. Pour your KHP sample in flask #1. (4) Repeat step 3 two more times for flasks #2 a nd #3. (5) To each flask, add approximately 30 mL of distilled water. Warm the flasks slightly and swirl them until all the KHP is dissolved. (6) Obtain about 250 mL of NaOH in a clean, dry 250 mL Erlenmeyer flask. Stopper the flask until you are rea dy for the solution in step 6d. (7) Obtain one buret and clean it. (a) First, rinse the buret a couple of times with tap water, pouring the water from a beaker. (b) Then, scrub the buret with a detergent solution, using a long - handled buret brush. (c) Next, rinse out the detergent with tap water several times and finally with distilled water. Be sure to also drain through the tip. (d) After draining the distilled water, rinse the buret…
2I– (aq) + H2O2 (aq) + 2H3O + (aq) → I2 (aq) + 4H2O (l) (slow) C6H8O6 (aq) + 2H2O (l) + I2 (aq) → C6H6O6 (aq) + 2H3O + (aq) + 2I– (aq) (very fast) I2 (aq) + I– (aq) ⇌ I – 3 (aq) I3- (aq) + starch → blue I3- · starch complex (aq) (fast) A different 0.100 L reaction mixture is prepared with initial concentrations of 1.0×10−2 M iodide I– , 2.0 × 10−3 M ascorbic acid C6H8O6 , and 0.135 M hydrogen peroxide H2O2 . If the first two reactions above procede at the same rate (they’re limited by the first one!), which of these reactants will be completely consumed first?
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Time remaining: 00 :09 :31 Chemistry DETERMINATION OF BIOLOGICAL OXYGEN DEMAND USING THE MODIFIED WINKLER METHOD GUIDE QUESTIONS: 1. What are the pertinent chemical equations in the standardization of sodium thiosulfate solution? 2. Explain the reason for the addition of H2SO4 and excess KI. 3. What is the effect of adding the acid before KI? 4. Present the pertinent chemical equations involved in the analysis. 5. Explain the stepwise production of titratable 12 from dissolved Oz in the sample. 6. Explain why the reagents are added in the specific sequence described in the experiment. 7. Explain the would-be effects (if any) of the following considerations: a. Water sample was made to stand overnight before analysis b. MnSO4 was added and the solution was made to stand overnight before the analysis 8. What are the possible sources of errors and their effect on the calculated parameters?
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