3. Explain the significance of each point or region in the following titration curve. (5 marks) A C B 17.5 mL D B E PH
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PH 4. For the titration curve shown on the previous page, suggest a possible titrant and test solution. Use features of the titration curve to justify your answer. (4 marks) 5. Use the following titration curve to answer questions 5.a. to 5.e: Titration Curve for the Titration of 65.0 mL of Nitric Acid with 0.800-mol/L Aqueous Potassium Hydroxide solution 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 5 10 15 20 25 30 35 Volume of 0.800-mol/L KOH(aq) Added (ml) 40 45
a. b. C. Identify the volume of titrant used to reach the equivalence point for the titration. (1 mark) 22.5 mL Identify the pH at the equivalence point for the titration. (1 mark) PH of 7 Identify a suitable indicator for the titration. (1 mark) d. Identify the colour change that signifies the endpoint for the titration using the indicator you selected in question 4.c. (1 mark) e. Determine the concentration of the nitric acid solution analyzed in the titration. (5 marks)