Titration Curves: Weak acid with strong base14.0The equivalence-pointpH is NOT 7.00 here.Why not??Excess baseresults in high pH12.0Equivalencepoint10.0Cole „nangepiienolphthaleinBromphenol blue was okfor the strong acid/strongbase titration, but itchanges color far too early8.06.0pH = pkato be useful here.4.0Color change| bromphenol blueExcess acidresults in low pH2.00.00.05.010.015.020.025.030.0Volume of 0.500 M NaOH, mLCH;COOH + NaOH → Na CH,CO0 + H,0Hd

Acid-base titration is an analytical technique utilized to determine the unknown concentration of an…

Answered: The equivalence-point pH is NOT 7.00…

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The equivalence-point pH is NOT 7.00 here. Why not??

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter15: Complex Acid/base Systems

Section: Chapter Questions

Problem 15.29QAP

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Question

Titration Curves: Weak acid with strong base
14.0
The equivalence-point
pH is NOT 7.00 here.
Why not??
Excess base
results in high pH
12.0
Equivalence
point
10.0
Cole „nange
piienolphthalein
Bromphenol blue was ok
for the strong acid/strong
base titration, but it
changes color far too early
8.0
6.0
pH = pka
to be useful here.
4.0
Color change
| bromphenol blue
Excess acid
results in low pH
2.0
0.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
Volume of 0.500 M NaOH, mL
CH;COOH + NaOH → Na CH,CO0 + H,0
Hd

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