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A 50.00-mL sample contains 1.80 g of KHC8H4O4, known as KHP. This sample is used to standardize an NaOH solution. At the equivalence point, 34.30 mL of NaOH have been added. Ka (HC8H4O4) = 3.9 x 10-6 Indicators that change color within the pH range: bromothymol blue = 6.0- 7.7 phenolphthalein = 8.3 - 9.8 zarin yellow R = 10.0 - 12.0 Visited a. What was the concentration of the NaOH? Concentration = M b. What is the pH at the equivalence point? pH = c. Which indicator, bromothymol blue, phenolphthalein, or alizarin yellow R, should be used in the titration? î

A 50.00-mL sample contains 1.80 g of KHC8H4O4, known as KHP. This sample is used to standardize an NaOH solution. At the equivalence point, 34.30 mL of NaOH have been added. Ka (HC8H4O4) = 3.9 x 10-6 Indicators that change color within the pH range: bromothymol blue = 6.0- 7.7 phenolphthalein = 8.3 - 9.8 zarin yellow R = 10.0 - 12.0 Visited a. What was the concentration of the NaOH? Concentration = M b. What is the pH at the equivalence point? pH = c. Which indicator, bromothymol blue, phenolphthalein, or alizarin yellow R, should be used in the titration? î

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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A 50.00-mL sample contains 1.80 g of KHC8H4O4, known as KHP. This sample is used to standardize an NaOH solution. At the equivalence point, 34.30 mL of NaOH have been added. Ka (HC8H4O4) = 3.9 x 10-6 Indicators that change color within the pH range: bromothymol blue = 6.0- 7.7 phenolphthalein = 8.3 9.8 zarin yellow R = 10.0 - 12.0 Visited a. What was the concentration of the NaOH? Concentration = M b. What is the pH at the equivalence point? pH = c. Which indicator, bromothymol blue, phenolphthalein, or alizarin yellow R, should be used in the titration?
Transcribed Image Text:A 50.00-mL sample contains 1.80 g of KHC8H4O4, known as KHP. This sample is used to standardize an NaOH solution. At the equivalence point, 34.30 mL of NaOH have been added. Ka (HC8H4O4) = 3.9 x 10-6 Indicators that change color within the pH range: bromothymol blue = 6.0- 7.7 phenolphthalein = 8.3 9.8 zarin yellow R = 10.0 - 12.0 Visited a. What was the concentration of the NaOH? Concentration = M b. What is the pH at the equivalence point? pH = c. Which indicator, bromothymol blue, phenolphthalein, or alizarin yellow R, should be used in the titration?
A generic base, B, is added to 30.00 L of water. The pH of the solution is found to be 8.82. What is the concentration of the base B in the solution? Ka for the acid HB at 25°C is 8.0 × 10-5. Concentration = M
Transcribed Image Text:A generic base, B, is added to 30.00 L of water. The pH of the solution is found to be 8.82. What is the concentration of the base B in the solution? Ka for the acid HB at 25°C is 8.0 × 10-5. Concentration = M
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