The purpose of this lab was to determine the concentration of an unknown acid or base, in this lab I used 0.1M Hydrochloric Acid Solution (HCI). I also used NaOH as my titrant (known solution). During the lab I completed two parts. Part one was finding the course titration, and part two was finding the fine titration. By using these two chemicals and methods I was able to determine the molar concentration for HCI using the formula. M1V1=M2V2 To determine the molar concentration for HCI I started by finding the course titration. By doing this first start by dispensing our NaOH solution into our HCI solution. I recorded the initial reading of the buret which was zero, then added 2 mL at a time to make sure I didn't miss the equivalence point.. (Note I used two drops of phenolphthalein in order to see a color change). Once the color began to change from clear to pink I knew I had found the equivalence point and recorded the final buret reading. I did the same process for finding fine titration of HCI also but this time adding one drop of NaOH solution at a time. After completing the lab I recorded the following data in my lab book. Course Titration Initial buret volume reading of NaOH titrant (mL) Final buret volume reading of NaOH titrant Volume of NaOH solution dispensed (mL) Volume of HCI solution in the flask (mL) Fine Titration Initial buret volume reading of NaOH titrant (mL) Final buret volume reading of NaOH titrant Volume of NaOH solution dispensed (mL) Volume of HCI solution in the flask (mL) Course Titration 0 28 30.1 5 Fine Titration 0 30.09 30.09 5
The purpose of this lab was to determine the concentration of an unknown acid or base, in this lab I used 0.1M Hydrochloric Acid Solution (HCI). I also used NaOH as my titrant (known solution). During the lab I completed two parts. Part one was finding the course titration, and part two was finding the fine titration. By using these two chemicals and methods I was able to determine the molar concentration for HCI using the formula. M1V1=M2V2 To determine the molar concentration for HCI I started by finding the course titration. By doing this first start by dispensing our NaOH solution into our HCI solution. I recorded the initial reading of the buret which was zero, then added 2 mL at a time to make sure I didn't miss the equivalence point.. (Note I used two drops of phenolphthalein in order to see a color change). Once the color began to change from clear to pink I knew I had found the equivalence point and recorded the final buret reading. I did the same process for finding fine titration of HCI also but this time adding one drop of NaOH solution at a time. After completing the lab I recorded the following data in my lab book. Course Titration Initial buret volume reading of NaOH titrant (mL) Final buret volume reading of NaOH titrant Volume of NaOH solution dispensed (mL) Volume of HCI solution in the flask (mL) Fine Titration Initial buret volume reading of NaOH titrant (mL) Final buret volume reading of NaOH titrant Volume of NaOH solution dispensed (mL) Volume of HCI solution in the flask (mL) Course Titration 0 28 30.1 5 Fine Titration 0 30.09 30.09 5
Chapter15: Acid-base Equilibria
Section: Chapter Questions
Problem 113CP: When a diprotic acid. H2A. is titrated with NaOH, the protons on the diprotic acid are generally...
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Transcribed Image Text:The purpose of this lab was to determine the concentration of an unknown acid or base, in this
lab I used 0.1M Hydrochloric Acid Solution (HCI). I also used NaOH as my titrant (known
solution). During the lab I completed two parts. Part one was finding the course titration, and
part two was finding the fine titration. By using these two chemicals and methods I was able to
determine the molar concentration for HCI using the formula.
M1V1=M2V2
To determine the molar concentration for HCI I started by finding the course titration. By doing
this first start by dispensing our NaOH solution into our HCI solution. I recorded the initial
reading of the buret which was zero, then added 2 mL at a time to make sure I didn't miss the
equivalence point. . (Note I used two drops of phenolphthalein in order to see a color change).
Once the color began to change from clear to pink I knew I had found the equivalence point and
recorded the final buret reading. I did the same process for finding fine titration of HCI also but
this time adding one drop of NaOH solution at a time. After completing the lab I recorded the
following data in my lab book.
Course Titration
Course Titration
Initial buret volume reading of NaOH titrant (mL)
Final buret volume reading of NaOH titrant
Volume of NaOH solution dispensed (mL)
Volume of HCI solution in the flask (ml)
Fine Titration
Initial buret volume reading of NaOH titrant (mL)
Final buret volume reading of NaOH titrant
Volume of NaOH solution dispensed (mL)
Volume of HCI solution in the flask (mL)
0
28
30.1
5
Fine Titration
0
30.09
30.09
5
Transcribed Image Text:Data Analysis:
For Course Titration :
For Fine Titration:
M1V1=M2V2
30.05 (0.1)
5
= 602M HCI Concentration
M1V1=M2V2
30.09 (0.1)
5
=.601M HCI Concentration
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