A 20.00-ml sample contains 1.00 g of NAHCO,. This sample is used to standardize an NAOH solution. At the equivalence point, 39.60 mL of NAOH have been added. K,(HCO, ) - 4.8 x 10 1" Indicators that change color within the pH range: bromothymol blue - 6.0 – 7.7 phenolphthalein = 8.3 – 9.8 alizarin yellow R = 10.0 – 12.0 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 20.00-ml sample contains 1.00 g of NAHCO,. This sample is used to standardize an NAOH solution. At the equivalence point, 39.60 mL of NAOH have been added. K,(HCO, ) - 4.8 x 10 1" Indicators that change color within the pH range: bromothymol blue - 6.0 – 7.7 phenolphthalein = 8.3 – 9.8 alizarin yellow R = 10.0 – 12.0 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?

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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