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 and 10.0 M NaOH solution titrant was dispensed until it changed color. The final volume of the unknown acid sample is 11.680 mL. According to the website, the concentration of the acid is 1.53 M.  Please provide the computation for the final concentration of the unknown sample.

Appl Of Ms Excel In Analytical Chemistry
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ISBN:9781285686691
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Chapter8: Polyfunctional Acids And Bases
Section: Chapter Questions
Problem 10P
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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).

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 and 10.0 M NaOH solution titrant was dispensed until it changed color. The final volume of the unknown acid sample is 11.680 mL. According to the website, the concentration of the acid is 1.53 M.  Please provide the computation for the final concentration of the unknown sample. 

10.0 M NAOH
Phenolphthalein
50.000 mL@ 25.0°C
99.850 mL @ 25.0°C
10 mL Pipette
0.0000 mL @ 25.0°C
Unknown Acid Sample
11.680 mL@ 25.1°C
Unknown Acid
50 mL Burette
90.000 mL@ 25.0°C
48.470 mL @ 25.0°C
Transcribed Image Text:10.0 M NAOH Phenolphthalein 50.000 mL@ 25.0°C 99.850 mL @ 25.0°C 10 mL Pipette 0.0000 mL @ 25.0°C Unknown Acid Sample 11.680 mL@ 25.1°C Unknown Acid 50 mL Burette 90.000 mL@ 25.0°C 48.470 mL @ 25.0°C
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! !
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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