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Unformatted text preview: acidity from alerting the titration endpoint. H 2 CO 3 (aq) CO 2 (aq) + H 2 O 3. (4 points) Give the pH range for the following indictor transitions: a. Phenolphthalein transitions from colorless to fuschia: Clear at 8.2 to fuschia at 10 b. Bromocresol green transitions from blue to yellow: Yellow at 3.8 to blue 5.4 4. (4 points) Why do we have to perform two titrations using the indicators above to analyze our unknown sample? Spring 2011 Student ID:_______________________________ 5. (4 points) Sketch a titration curve for Na 2 CO 3 vs HCl. Label the axes and label the equivalence points and indicator location. Please take a look at the curve titled Na 2 CO 3 and NaOH vs. HCl in your expt 2 lecture notes....
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