3. Two laboratory staff titrated a 50.00 mL of hydrochloric acid with an unknown concentration with a standardized 0.1 N Sodium hydroxide. HCl + NaOH NaCl + H2O The students obtained the following results: Student A: 23.17 mL, 22.69 mL, 23.25 mL, 22.97 mL Student B: 25.25 mL, 25.19 mL, 25.23 mL, 25.23 mL a. (Determine the mean and standard deviation for each data set. b. Which staff was more precise? Explain. c. If the unknown HCl sample has a concentration of 0.040 M, which staff is more accurate?

3. Two laboratory staff titrated a 50.00 mL of hydrochloric acid with an unknown concentration with a standardized 0.1 N Sodium hydroxide. HCl + NaOH NaCl + H2O The students obtained the following results: Student A: 23.17 mL, 22.69 mL, 23.25 mL, 22.97 mL Student B: 25.25 mL, 25.19 mL, 25.23 mL, 25.23 mL a. (Determine the mean and standard deviation for each data set. b. Which staff was more precise? Explain. c. If the unknown HCl sample has a concentration of 0.040 M, which staff is more accurate?

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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6. In an experiment, the molecular formula for calcium hydroxide was determined to be Ca(OH)2. In this experiment, 0.050 g of Ca (s) was added to 150. mL of DI water. After adding 10 drops of 0.1% thymol blue indicator, the solution was titrated with 0.30 M HCl. a. Write the balanced equation for the net ionic reaction that occurred during the titration. b. Calculate the volume of 0.30 M HCl required to reach the end point of the titration. C. If the initial reading of HCl in the burette was 25.60 mL, what was the final reading of HCl in the burette at the end point of the titration?
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Question 12
What’s the answer in M
5. The concentration of an unknown sample of sulfuric acid was determined by the method used in this experiment, using two sets of titrations. In the first titration the sodium hydroxide was standardized by titrating 0.1355g of oxalic acid dihydrate (molar mass - 126.07g/mole) with 25.30mL of sodium hydroxide solution. In the second titration 20.00mL of the unknown sulfuric acid solution was titrated with 22.85mL of the sodium hydroxide solution. What was the concentration of the sulfuric acid? (Show your work!!)
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