Answered: To measure the amount of citric 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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Question

To measure the amount of citric acid (CzHgO(CO,#/)g) in a certain candy, an analytical chemist dissolves a 21.00 g sample of the candy in 200. mL. of water and titrates this solution to the endpoint with 12.8 mL of 0.280 M sodium hydroxide (NaH) solution,

To measure the amount of citric acid
and titrates this solution to the endpoint with 12.8 mL of 0.280 M sodium hydroxide (NaOH) solution.
The balanced chemical equation for the reaction is:
CyH5O(CO,H),(aq) +30H (aq) C₂H₂O(CO₂) (aq) + 3H₂0 (1)
(C3H5O(CO,H),) in a certain candy, an analytical chemist dissolves a 21.00 g sample of the candy in 200. mL of water
What kind of reaction is this?
If you said this was a precipitation reaction, enter the chemical formula of the
precipitate.
If you said this was an acid-base reaction, enter the chemical formula of the
reactant that is acting as the base.
If you said this was a redox reaction, enter the chemical symbol of the element
that is oxidized.
Calculate the mass percent of C3H₂O(CO₂H), in
in the sample. Be sure your
answer has 3 significant digits.
O precipitation
O acid-base
O redox
0
0
0
0%
X
L
S
x10
?

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