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Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL Erlenmeyer flask and filled it up to the mark with deionized water. The students then proceeded to make 250- mL of a 0.18 M NAOH(aq) solution in another 250-mL Erlenmeyer flask. The students took a 22-mL aliquot of the acid solution and transfer it to another 250-mL Erlenmeyer flask. The students were given a pH meter that was already calibrated by their teaching assistant (T.A.) and they got the following result shown in the table below. How many mmoles of NaOH(aq) did it take to reach the equivalence point? Table 2. Titration curve data. VNAOH VNAOH pH pH (mL) (mL) 2.65 8.00 6.32 1 3.29 8.10 10.45 3.63 8.20 10.93 3.88 8.30 11.16 4 4.10 8.40 11.30 4.32 8.50 11.41 4.57 8.60 11.50 7.00 4.93 8.70 11.57 7.10 4.98 8.80 11.63 7.20 5.03 8.90 11.68 7.30 5.09 11.73

Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL Erlenmeyer flask and filled it up to the mark with deionized water. The students then proceeded to make 250- mL of a 0.18 M NAOH(aq) solution in another 250-mL Erlenmeyer flask. The students took a 22-mL aliquot of the acid solution and transfer it to another 250-mL Erlenmeyer flask. The students were given a pH meter that was already calibrated by their teaching assistant (T.A.) and they got the following result shown in the table below. How many mmoles of NaOH(aq) did it take to reach the equivalence point? Table 2. Titration curve data. VNAOH VNAOH pH pH (mL) (mL) 2.65 8.00 6.32 1 3.29 8.10 10.45 3.63 8.20 10.93 3.88 8.30 11.16 4 4.10 8.40 11.30 4.32 8.50 11.41 4.57 8.60 11.50 7.00 4.93 8.70 11.57 7.10 4.98 8.80 11.63 7.20 5.03 8.90 11.68 7.30 5.09 11.73

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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Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL Erlenmeyer flask and filled it up to the mark with deionized water. The students then proceeded to make 250- mL of a 0.18 M NaOH(ag) solution in another 250-mL Erlenmeyer flask. The students took a 22-mL aliquot of the acid solution and transfer it to another 250-mL Erlenmeyer flask. The students were given a pH meter that was already calibrated by their teaching assistant (T.A.) and they got the following result shown in the table below. How many mmoles of NaOH(ag) did it take to reach the equivalence point? Table 2. Titration curve data. VNAOH VNAOH pH pH (mL) (mL) 2.65 8.00 6.32 1 3.29 8.10 10.45 2 3.63 8.20 10.93 3 3.88 8.30 11.16 4 4.10 8.40 11.30 5 4.32 8.50 11.41 6 4.57 8.60 11.50 7.00 4.93 8.70 11.57 7.10 4.98 8.80 11.63 7.20 5.03 8.90 11.68 7.30 5.09 11.73
Transcribed Image Text:Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL Erlenmeyer flask and filled it up to the mark with deionized water. The students then proceeded to make 250- mL of a 0.18 M NaOH(ag) solution in another 250-mL Erlenmeyer flask. The students took a 22-mL aliquot of the acid solution and transfer it to another 250-mL Erlenmeyer flask. The students were given a pH meter that was already calibrated by their teaching assistant (T.A.) and they got the following result shown in the table below. How many mmoles of NaOH(ag) did it take to reach the equivalence point? Table 2. Titration curve data. VNAOH VNAOH pH pH (mL) (mL) 2.65 8.00 6.32 1 3.29 8.10 10.45 2 3.63 8.20 10.93 3 3.88 8.30 11.16 4 4.10 8.40 11.30 5 4.32 8.50 11.41 6 4.57 8.60 11.50 7.00 4.93 8.70 11.57 7.10 4.98 8.80 11.63 7.20 5.03 8.90 11.68 7.30 5.09 11.73
7.40 5.16 10 12.03 7.50 5.24 11 12.20 7.60 5.33 12 12.31 7.70 5.45 13 12.39 7.80 5.60 14 12.46 7.90 5.83 15 12.52 2.263 0.085 1.036 3.031 2.452 2.018 O 2.638 2.851
Transcribed Image Text:7.40 5.16 10 12.03 7.50 5.24 11 12.20 7.60 5.33 12 12.31 7.70 5.45 13 12.39 7.80 5.60 14 12.46 7.90 5.83 15 12.52 2.263 0.085 1.036 3.031 2.452 2.018 O 2.638 2.851
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