1. a) The graph shown on the right shows the titration curves of a 14 1 M solution of a weak acid with a strong base (curve A) and a 1 M solution of a strong acid with the same base (curve B). Which curve is which - label the two curves on the graph. b) Suppose you have four color indicators to choose from to detect the equivalence point of the titration reaction represented by the red curve. The pK, values of the four indicators are 3.3, 5.0, 7.0, and 9.0. 12 10 8 6. 4 Which indicator would be the best one to choose? Volume of strong base (mL) N O Hd

1. a) The graph shown on the right shows the titration curves of a 14 1 M solution of a weak acid with a strong base (curve A) and a 1 M solution of a strong acid with the same base (curve B). Which curve is which - label the two curves on the graph. b) Suppose you have four color indicators to choose from to detect the equivalence point of the titration reaction represented by the red curve. The pK, values of the four indicators are 3.3, 5.0, 7.0, and 9.0. 12 10 8 6. 4 Which indicator would be the best one to choose? Volume of strong base (mL) N O Hd

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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For each scenario below, select the color of the solution using the indicator thymol blue during the titration. When you first add indicator to your Na2CO3 solution, the solution is basic (pH ~10), and the color is [Select] At the equivalence point for the titration, the moles of added HCI are equal to the moles of Na2CO3. One drop (or less!) past this is called the endpoint. The added HCI begins to titrate the thymol blue indicator itself. At the endpoint, the indicator color is [Select] When you weren't paying attention and added too much HCI (~12 mL extra), the color is [Select] When you really weren't paying attention and reached the second equivalence point of Na2CO3, the color is ✓ [Select] blue yellow red orange green Question 9
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From the standard properties of plotted titration curves, which one best represents the titration of a weak acid with a strong base? The curve is with a semi S orientation with the midpoint of the steep part at pH 7 The curve is with a semi Z orientation with the midpoint of the steep part at pH 7 The curve is with an "S' orientation with the midpoint of the steep part at pH > 7 The curve is with a "Z" orientation with the midpoint of the steep part at pH <7 Representative curve cannot be predicted
23.Determine the pH ranges of the equivalence points in the titration curve below.
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The following titration curve depicts the titration of a weak base with a strong acid. 10 PH 2987654321 ++ Which of the following values best approximates the pKb value of the weak base? a. 9.8 b. 8.4 c. 7 d. 4.2