A chemistry graduate student is given 450. mL of a 0.70M pyridine (C,H,N) solution. Pyridine is a weak base with K, = 1.7 × 10. What mass of C, H,NHBr should the student dissolve in the C, H,N solution to turn it into a buffer with pH = 4.80? You may assume that the volume of the solution doesn't change when the C, H,NHBr is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
A chemistry graduate student is given 450. mL of a 0.70M pyridine (C,H,N) solution. Pyridine is a weak base with K, = 1.7 × 10. What mass of C, H,NHBr should the student dissolve in the C, H,N solution to turn it into a buffer with pH = 4.80? You may assume that the volume of the solution doesn't change when the C, H,NHBr is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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![A chemistry graduate student is given 450. mL of a 0.70M pyridine (C, H,N) solution. Pyridine is a weak base with K = 1.7 × 10⁹. What mass
of C,H, NHBr should the student dissolve in the C, H,N solution to turn it into a buffer with pH = 4.80?
You may assume that the volume of the solution doesn't change when the C,H-NHBr is dissolved in it. Be sure your answer has a unit symbol,
and round it to 2 significant digits.
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Explanation
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Transcribed Image Text:A chemistry graduate student is given 450. mL of a 0.70M pyridine (C, H,N) solution. Pyridine is a weak base with K = 1.7 × 10⁹. What mass
of C,H, NHBr should the student dissolve in the C, H,N solution to turn it into a buffer with pH = 4.80?
You may assume that the volume of the solution doesn't change when the C,H-NHBr is dissolved in it. Be sure your answer has a unit symbol,
and round it to 2 significant digits.
R
V
0
Explanation
%
5
T
G
B
80
A
6
Check
Y
H
X
MacBook Pro
N
&
7
U
5
J
*
8
M
1
K
(
9
➡
O
)
0
L
© 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility
P
O
+
?
=
W
8
[
]
delete
return
?
F
olo
Ar
Expert Solution
Step 1: Determine the data given
The volume of the pyridine solution = 450 mL
The concentration of the pyridine solution = 0.70 M
The pH of the buffer solution = 4.80
The 
of pyridine = format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20font-family%3D%22Times%20New%20Roman%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%224.5%22%20y%3D%2216%22%3E1%3C%2Ftext%3E%3Ctext%20font-family%3D%22math176ce5a003e2bf1d1740fbf16a0%22%20font-size%3D%2214%22%20text-anchor%3D%22middle%22%20x%3D%2210.5%22%20y%3D%2216%22%3E.%3C%2Ftext%3E%3Ctext%20font-family%3D%22Times%20New%20Roman%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2217.5%22%20y%3D%2216%22%3E7%3C%2Ftext%3E%3Ctext%20font-family%3D%22math176ce5a003e2bf1d1740fbf16a0%22%20font-size%3D%2214%22%20text-anchor%3D%22middle%22%20x%3D%2232.5%22%20y%3D%2216%22%3E%26%23xD7%3B%3C%2Ftext%3E%3Ctext%20font-family%3D%22Times%20New%20Roman%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2251.5%22%20y%3D%2216%22%3E10%3C%2Ftext%3E%3Ctext%20font-family%3D%22math176ce5a003e2bf1d1740fbf16a0%22%20font-size%3D%2210%22%20text-anchor%3D%22middle%22%20x%3D%2263.5%22%20y%3D%2211%22%3E%26%23x2212%3B%3C%2Ftext%3E%3Ctext%20font-family%3D%22Times%20New%20Roman%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2270.5%22%20y%3D%2211%22%3E9%3C%2Ftext%3E%3C%2Fsvg%3E)
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