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Analysis & Discussion: 1. Based on your three trials, discuss the precision of your data. 2. The actual concentration of the unknown is 0.200 M. (Check with instructor to ensure that this value is accurate.) Calculate the percent error based on the average molarity of your three trials. 3. Based on your answer to (2), discuss the accuracy of your data.

Analysis & Discussion: 1. Based on your three trials, discuss the precision of your data. 2. The actual concentration of the unknown is 0.200 M. (Check with instructor to ensure that this value is accurate.) Calculate the percent error based on the average molarity of your three trials. 3. Based on your answer to (2), discuss the accuracy of your data.

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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Table 1: Titration Data for Unknown #_C Volume of unknown (HCI) (mL) Initial burette reading (mL) Final burette reading (mL) Volume Titrant (NaOH) Added (mL) Molarity of HCI (M) Average (M) Trial 1 10.00 mL 21.00 mL 3.30 mL 17.70 mL 0.1770M 0.1755M Trial 2 10.00 mL 29.45 mL 12.20 mL 17.25 mL 0.1725M Trial 3 10.00 mL 33.10 mL 15.40 mL 17.70 mL 0.1770M
Transcribed Image Text:Table 1: Titration Data for Unknown #_C Volume of unknown (HCI) (mL) Initial burette reading (mL) Final burette reading (mL) Volume Titrant (NaOH) Added (mL) Molarity of HCI (M) Average (M) Trial 1 10.00 mL 21.00 mL 3.30 mL 17.70 mL 0.1770M 0.1755M Trial 2 10.00 mL 29.45 mL 12.20 mL 17.25 mL 0.1725M Trial 3 10.00 mL 33.10 mL 15.40 mL 17.70 mL 0.1770M
Analysis & Discussion: 1. Based on your three trials, discuss the precision of your data. 2. The actual concentration of the unknown is 0.200 M. (Check with instructor to ensure that this value is accurate.) Calculate the percent error based on the average molarity of your three trials. 3. Based on your answer to (2), discuss the accuracy of your data. 4. Discuss the potential sources of error that could have affected either/both your accuracy and precision. (Examples could include items such as: a) You forgot to rinse the burette with the NaOH solution; b) Bubbles of air were trapped in the burrette tip; c) You added 10 drops of phenolphthalein instead of 5 drops; d) The meniscus of NaOH was sitting right on the 32 line so you reported the reading as 32 mL instead of 32.00 mL.) Explain HOW and WHY each of these may have impacted your results.
Transcribed Image Text:Analysis & Discussion: 1. Based on your three trials, discuss the precision of your data. 2. The actual concentration of the unknown is 0.200 M. (Check with instructor to ensure that this value is accurate.) Calculate the percent error based on the average molarity of your three trials. 3. Based on your answer to (2), discuss the accuracy of your data. 4. Discuss the potential sources of error that could have affected either/both your accuracy and precision. (Examples could include items such as: a) You forgot to rinse the burette with the NaOH solution; b) Bubbles of air were trapped in the burrette tip; c) You added 10 drops of phenolphthalein instead of 5 drops; d) The meniscus of NaOH was sitting right on the 32 line so you reported the reading as 32 mL instead of 32.00 mL.) Explain HOW and WHY each of these may have impacted your results.
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