Question 31 buffer regions are identified by v iii i

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Question 31 Buffer region(s) are identified by V, III, I III only IV and II V and III Correct! Correct!
1 / 1 pts Question 32
6/12/2020 8.4 Module 8 Lesson 4 Assignment: Chemistry 30 (5) Reg - Perrott - 1(A) Equivalence point(s) are represented by V, III, I III only IV and II Correct! Correct!
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1 / 1 pts Question 33 Correct! Correct!
0 / 1 pts Question 34 A sample of potassium hydrogen sulfite is mixed with chlorophenol red indicator. The equilibrium equation and the colour of the equilibrium would be:
6/12/2020 8.4 Module 8 Lesson 4 Assignment: Chemistry 30 (5) Reg - Perrott - 1(A) 30/32 A orrect Answer orrect Answer B ou Answered ou Answered C D 1 / 1 pts Question 35 Identify which of the following combinations of substances represent an ideal buffer system. 0.10 mol/L H SO (aq) mixed with 0.10 mol/L NaHSO (aq) 2 4 4 0.10 mol/L H S(aq) mixed with 0.10 mol/L NaHS(aq) Correct! Correct! 2 0.10 mol/L NaHSO (aq) mixed with 0.10 mol/L NaOH(aq) 3 0.10 mol/L NaHSO (aq) mixed with 1.0 mol/L Na SO (aq) 3 2 3 1 / 1 pts Question 36 Use the following information to answer the next 2 questions.
6/12/2020 8.4 Module 8 Lesson 4 Assignment: Chemistry 30 (5) Reg - Perrott - 1(A) A technician prepares the following buffer system: C H COOH(aq) + H O(l) C H COO (aq) + H O (aq) After dissolving an adequate amount of benzoic acid in 100 mL of water to produce a 0.10 mol/L solution of benzoic acid, which of the following steps is crucial in preparing the above buffer system? 6 5 2 6 5 3 + adding the correct amount of sodium benzoate to make a 0.10 mol/L solution of sodium benzoate. Correct! Correct! adding water to shift the equilibrium to the right, thus producing an increased amount of the benzoate ion. titrating the mixture with sodium hydroxide to shift the equilibrium to the right, thus producing an increased amount of the benzoate ion. titrating the mixture with hydrochloric acid to shift the equilibrium to the right, thus producing an increased amount of the benzoate ion.
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1 / 1 pts Question 37 If a small sample of potassium hydroxide is added to the above equilibrium system, the pH will remain approximately constant and the equilibrium will shift to the right .
6/12/2020 8.4 Module 8 Lesson 4 Assignment: Chemistry 30 (5) Reg - Perrott - 1(A) 32/32 Answer 2: remain approximately constant Correct! Correct! shift to the right Correct! Correct! Quiz Score: 47 out of 54

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