Which one of the following indicators would be appropriate to determine the equivalence point in the...
Which one of the following indicators would be appropriate to determine the equivalence point in the titration of 0.25 M HClO with 0.25 M NaOH?
thymol blue
bromocresol purple
bromocresol green
thymolphthalein
Homework Answers
as its a weak acid and strong base titation , at equivalnec point the ph will be in range of 8-10.
with this in mind lets analyse different indicators .
thymol blue - red to yellow in below range ph 1.2 -2.8
yellow to red in rangeof ph 8.0to9.6.
bromo cresolpurple -violet above 6.8
- yellow below 5.2
bromo creesol green - yellow below 3.8
- BLue above 5.4
green in between .
thymophthalein - colourless below9.3-10.5 changes colour to blue .
thus we choose thymol blue as the equivalence point falls near to Ph - 8.72 for a given value of /ka for acid .
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Which one of the following indicators would be appropriate to
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Please explain the correct answer to all three questions. Thank you! Incorrect Question 11 0/1 pts...
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Construct a rough plot of pH versus volume of added base for the titration of 50...
Construct a rough plot of pH versus volume of added base for the
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The following graph shows the pH curve for the titration of 25
mL of a 0.1 M monoprotic acid solution with a 0.1 M solution of a
monoprotic base.
mL of 0.1 M base added
(1) The pH curve represents the titration of a
_______(weak/strong) acid with a _______(weak/strong)base.
(2) Choose a suitable indicator for the endpoint
of the titration from the following pulldown list
__________.(bromocresol green / methyl red / bromothymol blue /
cresol red / thymol blue /...
Please explain the correct
answer to all three questions. Thank you!
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Construct a rough plot of pH versus volume of added base for the
titration of 50 mL of 0.070 M HCN with 0.075 M NaOH. Ka = 4.0*10-10
for HCN
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(b) What volume of base, in milliliters, is required to reach the
equivalence point?
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(d) What indicator would be most suitable to determine the
endpoint?
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(2).bromocresol green
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