Chemical Principles in the Laboratory
11th Edition
ISBN:9781305264434
Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Chapter22: Properties Of Systems In Chemical Equilibrium-le Chatelier's Principle
Section: Chapter Questions
Problem 1ASA: Methyl orange, HMO, is a common acid-base indicator. In solution it ionizes according to the...
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Transcribed Image Text:When 25 mL of 0.12 M aqueous ammonia is titrated with 0.12 M hydrobromic acid, what is the pH at the equivalence point?
X Incorrect.
10.2
Equivalence point pH =
Use correct number of significant digits;
X Incorrect.
Using the table below, select all indicators that could be used for the titration given above.
Approximate pH Range over
which the Color Changes
Color Change
(lower to higher pH)
Indicator
Methyl green
Yellow to blue
0.2-1.8
Thymol blue
1.2-2.8
Yellow to blue
Methyl orange
3.2-4.4
Red to yellow
Ethyl red
4.0-5.8
Colorless to red
Methyl purple
Purple to green
Yellow to purple
4.8-5.4
Bromocresol purple
5.2-6.8
Bromothymol blue
6.0-7.6
Yellow to blue
Phenol red
6.4-8.2
Yellow to red/violet
Litmus
4.7-8.3
Red to blue
Cresol red
7.0-8.8
Yellow to red
Thymol blue
8.0-9.6
Yellow to blue
Transcribed Image Text:Phenolphthalein
8.2–10.0
Colorless to pink
Thymolphthalein
9.4-10.6
Colorless to blue
Alizarin yellow R
10.1-12.0
Yellow to red
Clayton yellow
12.2–13.2
Yellow to amber
litmus
bromothymol blue
methyl orange
methyl green
ethyl red
thymol blue
methyl purple
clayton yellow
phenol red
bromocresol purple
cresol red
thymol blue
phenolphthalein
thymolphthalein
alizarin yellow R
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