(a) Kiyah adds 10 mL of hydrochloric acid to the reaction solution, tests the pH, and observes a yellow-green color on her pH paper. She then adds 5 mL of hydrochloric acid to her solution, tests the pH, and observes a dark red color on her pH paper. She isolates her pure vanillyl alcohol, and notes that her yield is lower than her classmates. i. Explain the reason behind Kiyah's lower yield from the scenario above. ii. iii. Molecularly, why does this happen? The work up step is a critical step in synthesizing and isolating vanillyl alcohol. What is a good indicator to stop adding hydrochloric acid?
(a) Kiyah adds 10 mL of hydrochloric acid to the reaction solution, tests the pH, and observes a yellow-green color on her pH paper. She then adds 5 mL of hydrochloric acid to her solution, tests the pH, and observes a dark red color on her pH paper. She isolates her pure vanillyl alcohol, and notes that her yield is lower than her classmates. i. Explain the reason behind Kiyah's lower yield from the scenario above. ii. iii. Molecularly, why does this happen? The work up step is a critical step in synthesizing and isolating vanillyl alcohol. What is a good indicator to stop adding hydrochloric acid?
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)
Transcribed Image Text:(a) Kiyah adds 10 mL of hydrochloric acid to the reaction solution, tests the pH, and observes a
yellow-green color on her pH paper. She then adds 5 mL of hydrochloric acid to her solution,
tests the pH, and observes a dark red color on her pH paper. She isolates her pure vanillyl
alcohol, and notes that her yield is lower than her classmates.
i.
Explain the reason behind Kiyah's lower yield from the scenario above.
ii.
iii.
Molecularly, why does this happen?
The work up step is a critical step in synthesizing and isolating vanillyl alcohol. What
is a good indicator to stop adding hydrochloric acid?
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