Shown below is the titration curve for phosphoric acid. At what pH is it entirely in the PO43 form? Phosphate Titration 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Equivalents OH O 0.6 O 2.1 O 4.5 O 7.2 O 9.6 O 12.5 O 14
Shown below is the titration curve for phosphoric acid. At what pH is it entirely in the PO43 form? Phosphate Titration 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Equivalents OH O 0.6 O 2.1 O 4.5 O 7.2 O 9.6 O 12.5 O 14
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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Transcribed Image Text:QUESTION 4
1
The table below shows the pKa values for the various functional groups on cysteine. In which of the
following forms will cysteine predominantly be found at pH 9.1?
group
pKa
carboxyl (-COOH)
1.96
sulfhydryl (-SH)
8.18
ammonium (-NH3")
10.13
А.
В.
CH,- SH
CH,- SH
H,N - CH- COOH
H,N- CH-COO*
С.
D.
CH,-S
CH,-S
H,N - CH-COO*
H,N CH- COO
O A
O B
ОС
O D

Transcribed Image Text:QUESTION 5
Shown below is the titration curve for phosphoric acid. At what pH is it entirely in the PO43- form?
Phosphate Titration
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Equivalents OH
O 0.6
O 2.1
O 4.5
O 7.2
O 9.6
O 12.5
O 14
Hd
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