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
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter16: Acid-base Equilibria
Section: Chapter Questions
Problem 16.123QP: A 25.0-mL sample of hydroxylamine is titrated to the equivalence point with 35.8 mL of 0.150 M HCl....
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