Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter14: Acid- Base Equilibria
Section: Chapter Questions
Problem 97AE: A student intends to titrate a solution of a weak monoprotic acid with a sodium hydroxide solution...
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Question
10 mL of unknown acid sample was placed in a 250 mL Flask. 3 drops (0.15 mL) of Phenolphthalein was added to the unknown acid sample. The 10.0 M NaOH solution titrant was also dispensed into the unkown acid sample until it changed color. The final volume of the unknown acid sample is 11.680 mL. Please provide the computation for the final concentration of the unknown acid sample.
Transcribed Image Text:Determine the Concentration of the Unknown Strong Acid
In this activity you will use the virtual lab to determine the concentration of a strong monoprotic acid. To do this, you can perform a titration using
NaOH and phenolphthalein found in the virtual lab. (Note: The concentration of the acid is between 0.025M and 2.5M so you will need to dilute the
NaOH solution so that the volume to reach the endpoint is between 10 and 50 mL).
Once you have determined the concentration of the acid, please enter your answer into a form at the bottom of this page.
What is the concentration of the acid (Please use three significant figures for your answer)
1.53
M.
Determine the Concentration of the Unknown Strong Acid: DONE
What was the concentration of the acid?
1.53 M.
Well done! !
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