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Short Answer Section 1. 10.0 mL of 0.40 M weak acid is being neutralized with 0.10 M NaOH. The results of this titration is shown below. 14 12 10 a. Referring to a chart of indicators and their turning points, which indicator would you use for this titration? Explain. 8 H 6 4 The suitable indicator for the titration. weak and and strong base Nach either thymol blue (pt lange bik 9.6 or phenolphta lein (pH range 8.3-10.0) of the would be 20 30 40 50 60 Volume of NaOH addod (ml) b. Using the symbol "HA" to represent the weak acid, use a dissociation equation to explain why this acid behaves as a weak acid weak acid HA can be depicted as HAcaq) = H (g) + A (am) IS The dissociation of where the equilibrium A lies more to the left dissociation very weak, and unstable. So, equilibrium lies to the left a strong base highly C. In the buffer zone between 20 and 30 mL of titrant added the pH doesn't change very much. How does Le Chatelier's Principle explain this phenomenon? d. Using the pH at the start of the titration, find the K, for this acid. You may find it helpful to set up an ICE table as part of your solution 10 70 80

Short Answer Section 1. 10.0 mL of 0.40 M weak acid is being neutralized with 0.10 M NaOH. The results of this titration is shown below. 14 12 10 a. Referring to a chart of indicators and their turning points, which indicator would you use for this titration? Explain. 8 H 6 4 The suitable indicator for the titration. weak and and strong base Nach either thymol blue (pt lange bik 9.6 or phenolphta lein (pH range 8.3-10.0) of the would be 20 30 40 50 60 Volume of NaOH addod (ml) b. Using the symbol "HA" to represent the weak acid, use a dissociation equation to explain why this acid behaves as a weak acid weak acid HA can be depicted as HAcaq) = H (g) + A (am) IS The dissociation of where the equilibrium A lies more to the left dissociation very weak, and unstable. So, equilibrium lies to the left a strong base highly C. In the buffer zone between 20 and 30 mL of titrant added the pH doesn't change very much. How does Le Chatelier's Principle explain this phenomenon? d. Using the pH at the start of the titration, find the K, for this acid. You may find it helpful to set up an ICE table as part of your solution 10 70 80

Chemistry
Chemistry
9th Edition
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Steven S. Zumdahl
Chapter15: Acid-base Equilibria
Section: Chapter Questions
Problem 7RQ: Sketch the titration curve for a weak acid titrated by a strong base. When performing calculations...
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Only part (c) and (d)
Short Answer Section 1. 10.0 mL of 0.40 M weak acid is being neutralized with 0,10 M NaOH, The results of this titration is shown below: 14 12 a. Referring to a chart of indicators and their turning points, which indicator 10 would you use for this titration? Explain. The Suitable indicator for the titration 4. weak acd and strong base NaCH ing cither thymal blue (ptl iange tolt 9.6) or phenol phtalein (ptt range 6i3-10.0) oe the 80 wou ld e 10 20 30 40 50 60 70 Volume of NaOH addod (ml) b. Using the symbol “HA" to represent the weak acid, use a dissociation equation to explain why this acid behaves as a weak acid con be depieted as HAagl The dissociation o a weak acid H where he tauilibrium weak. very unstable So, eywlibarium lies to the legt IS Ties more to the legt oli ssociation A a slrona base highly and c. In the buffer zone between 20 and 30 mL of titrant added the pH doesn't change very much. How does Le Chatelier's Principle explain this phenomenon? d. Using the pH at the start of the titration, find the K, for this acid. You may find it helpful to set up an ICE table as part of your solution'
Transcribed Image Text:Short Answer Section 1. 10.0 mL of 0.40 M weak acid is being neutralized with 0,10 M NaOH, The results of this titration is shown below: 14 12 a. Referring to a chart of indicators and their turning points, which indicator 10 would you use for this titration? Explain. The Suitable indicator for the titration 4. weak acd and strong base NaCH ing cither thymal blue (ptl iange tolt 9.6) or phenol phtalein (ptt range 6i3-10.0) oe the 80 wou ld e 10 20 30 40 50 60 70 Volume of NaOH addod (ml) b. Using the symbol “HA" to represent the weak acid, use a dissociation equation to explain why this acid behaves as a weak acid con be depieted as HAagl The dissociation o a weak acid H where he tauilibrium weak. very unstable So, eywlibarium lies to the legt IS Ties more to the legt oli ssociation A a slrona base highly and c. In the buffer zone between 20 and 30 mL of titrant added the pH doesn't change very much. How does Le Chatelier's Principle explain this phenomenon? d. Using the pH at the start of the titration, find the K, for this acid. You may find it helpful to set up an ICE table as part of your solution'
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