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Unformatted text preview: 7. Briefly describe the processes used to determine the molarity of your unknown acid. 8. Were the calculated molarities of your HCl solutions from the indicator method, titration curve and Gran plot method within a reasonable range (about 5%) of each other? 9. What was the concentration of your unknown acid? Which of the methods that you used to calculate the molarity of your unknown acid concentration did you determine to have the most accurate results? Why? 10. Using the indicator phenolphthalein in an acid-base titration is a common method of determining unknown concentrations of acids in general chemistry laboratories. Based on the observations you made during the titration with phenolphthalein and considering the results you obtained from the indicator and the results you obtained with the pH meter, either defend or oppose the use of the indicator as an effective method of determining the concentrations of acid solutions....
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This note was uploaded on 03/19/2011 for the course CH 204 taught by Professor Leytner during the Spring '08 term at University of Texas at Austin.
- Spring '08