D2L7_Answers - D2L Buffers / Titrations (Assignment#7) -...

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D2L Buffers / Titrations (Assignment#7) - Answers Q1. Which, if any, of the following aqueous mixtures would be a buffer system? 1) HSO 4 - , HSO 3 - Feedback: Difficulty: E 2) CH 3 COOH, NaH 2 PO 4 Feedback: Difficulty: E 3) None of the above will be a buffer solution. Feedback: Difficulty: E 4) H 2 PO 4 - , HCO 3 - Feedback: Difficulty: E 5) H 2 CO 3 , HCO 3 - Feedback: Difficulty: E Q2. Which one of the following pairs of 0.100 mol L -1 solutions, when mixed, will produce a buffer solution? 1) 50. mL of aqueous NaOH and 25. mL of aqueous HCl Feedback: Difficulty: E 2) 50. mL of aqueous CH 3 COOH and 25. mL of aqueous HCl Feedback: Difficulty: E 3) 50. mL of aqueous CH 3 COOH and 25. mL of aqueous CH 3 COONa Feedback: Difficulty: E
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4) 50. mL of aqueous CH 3 COOH and 100. mL of aqueous NaOH Feedback: Difficulty: E 5) 50. mL of aqueous CH 3 COONa and 25. mL of aqueous NaOH Feedback: Difficulty: E Q3. What is the pH of a buffer that consists of 0.20 M NaH 2 PO 4 and 0.40 M Na 2 HPO 4 ? K a = 6.2
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D2L7_Answers - D2L Buffers / Titrations (Assignment#7) -...

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