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. What is the molar mass of the solid acid in units of grams/mole to 2 decimal places? Table 2. Titration curve data. VNAOH VN2OH pH pH (mL) (mL) 2.65 8.00 6.32 1 3.29 8.10 10.45 2 3.63 8.20 10.93 3.88 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 9 11.73 7.40 5.16 10 12.03

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. What is the molar mass of the solid acid in units of grams/mole to 2 decimal places? Table 2. Titration curve data. VNAOH VN2OH pH pH (mL) (mL) 2.65 8.00 6.32 1 3.29 8.10 10.45 2 3.63 8.20 10.93 3.88 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 9 11.73 7.40 5.16 10 12.03

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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