IC_4603_L24_Titration_Equivalence_Points

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Jan 9, 2024

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Titrations and Equivalence Points EXPERIMENT 1: GETTING AQUAINTED WITH INDICATORS Data Sheet Table 2: Indicator, pH Range, and Color Change Beaker Indicator Color Initial pH pH at Color Change Final pH Final Color Amount of citric acid added (mL) 1 2 3 Table 3: Titration Data Part 2: Citric Acid Added (mL) Part 2: pH Part 3: Citric Acid Added (mL) Part 3: pH Part 3: Color 0.0 0.0 Total mL Added Total mL Added ©eScience Labs, LLC 2015
Titrations and Equivalence Points Post-Lab Questions 1. Use the graph paper to create a plot of the titration curve of 20 mL sudsy ammonia with 0.5 M citric acid. Be sure to title your graph and label your axes. 2. What is the pH of the solution at the equivalence point shown by the titration curve? 3. Which indicator shows a color change at about the same pH as the equivalence point? 4. Based on your answer to Question 3, choose an indicator to use to titrate the sudsy ammonia with citric acid (Part 3 of the experiment). Fill in the following data from Part 3: a. Initial color of the solution: b. Amount of citric acid added to reach the end point: c. Color of solution after endpoint was reached: 5. Is the indicator you chose a good indicator for this titration? Explain your answer. ©eScience Labs, LLC 2015
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