4 jIn ovder to perjorm a anion exchange column at pH=+.0 buyer is required. Your lab deatles to use a oodium phosphate bujjer. The Phosphate buyjer (PO oyotem has 3 ionizable protens and thus 3 pka values . pka, =2.2, , pkaz=6.86,pkasa l2.4). 4 your projessor gives you an old protocol that calls gor adding 4.189g A (Mw: 268. Otg Imol) and 4.434g g HA (Mwi 137.99 glml Ho water or a total g 500 mL. Calculate the ginal pH o Show all work ) A,ter making the buyjer in a and conyirming the pH you need to change this buyjer, b its pH to 4.0 5M NaOH. Calculate the number o the buper pH to 7.0. show all work exchange. In the lab mL the ion- you gind 5M Hel and acid or base needed to change
4 jIn ovder to perjorm a anion exchange column at pH=+.0 buyer is required. Your lab deatles to use a oodium phosphate bujjer. The Phosphate buyjer (PO oyotem has 3 ionizable protens and thus 3 pka values . pka, =2.2, , pkaz=6.86,pkasa l2.4). 4 your projessor gives you an old protocol that calls gor adding 4.189g A (Mw: 268. Otg Imol) and 4.434g g HA (Mwi 137.99 glml Ho water or a total g 500 mL. Calculate the ginal pH o Show all work ) A,ter making the buyjer in a and conyirming the pH you need to change this buyjer, b its pH to 4.0 5M NaOH. Calculate the number o the buper pH to 7.0. show all work exchange. In the lab mL the ion- you gind 5M Hel and acid or base needed to change
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:In order to perjorm a anion exchange pH=4.0 buyer is
column at
required. Your lab deatles to use a oodium phosphate buyjer. The Phosphate
byjer (Po oyotem has 3 ionizable protems and thus 3 pka values . pka, -2.2,
pkaz=6.86,pKas
-12.4)
%3D
a)
r projessor gives you an old protocol that calls
A (MW: 268. 07g Imol) and 4.4349 g HA (MW: 137.99 glmal.to
water for
show all work
your gor adding 4.78g
yor
4,789
a total
500 mL. Calculate the ginal pH g this buyjer,
the pH you need to change
its pH to 4.0 jor the ion- exchange . In the lab yan ind 5M Hcl and
acid or base needed to chenge
) Apter making the buyjer in a and
conpirming.
yor
5M NaOH, Calculate the number
mL
of
the buer pH to 7.0. show all work
Expert Solution
Step 1
a)
The pH of a buffer solution is given by Henderson-Hasselbalch equation.
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