Chapter 14 - Acids and Bases

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10/5/22, 8:07 PM Chapter 14 - Acids and Bases: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198736 1/8 Chapter 14 - Acids and Bases Due Oct 9 at 11:59pm Points 15 Questions 15 Available Aug 29 at 12am - Dec 4 at 11:59pm Time Limit None Allowed Attempts 2 Instructions Attempt History Attempt Time Score LATEST Attempt 1 104 minutes 15 out of 15  Correct answers are hidden. Instructions: 1. You have two attempts for this assignment. Canvas will keep the highest score. 2. You should take screenshots of all the questions (and answers) after each attempt. You are only allowed to see the questions and answers ONCE (after each attempt). 3. You are only allowed to see your score ONCE after each attempt. You cannot see the answers to questions that are marked incorrectly. You can only see which questions are marked wrong. 4. This assignment may contain some embedded images. If you cannot see the images. it is most likely because you are using an Apple, Mac, or iPad. Canvas is designed to be compatible with Google Chrome. Do not use Safari. If you have an Apple, Mac, or iPad, try installing Google Chrome and using that browser (not Safari). Also. try moving your mouse cursor over the "missing" images. Then, "right click" with your mouse. Then, select "View", "Download", or "Save As". Many students said that would work. 5. If the due date has already past for this assignment, you are still allowed to go ahead and do the assignment. Just know that you are allowed to be late for only TWO Homework assignments for the entire semester. So, you can submit TWO late Homework assignments without any late penalty. After TWO late homework assignments, all other late Homework assignments will receive a ZERO. The very last date to submit late Homework assignments (up to two late assignments only) is December 4, 2022 (11:59 PM). Take the Quiz Again

10/5/22, 8:07 PM Chapter 14 - Acids and Bases: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198736 2/8 Score for this attempt: 15 out of 15 Submitted Oct 5 at 8:07pm This attempt took 104 minutes. 1 / 1 pts Question 1 What is the conjugate acid of HCO ? 3 OH CO 3 2- H O 2 H O 3 + H CO 2 3 1 / 1 pts Question 2 What is the conjugate base of H PO ? 2 4 PO 4 3- HPO 4 2- H O 3 + OH H PO 3 4

10/5/22, 8:07 PM Chapter 14 - Acids and Bases: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198736 3/8 1 / 1 pts Question 3 Identify the weak diprotic acid. H SO 2 3 H PO 3 4 HClO 4 H SO 2 4 HNO 3 1 / 1 pts Question 4 Place the following in order of increasing acid strength. HBrO HBrO HBrO HBrO 2 3 4 HBrO < HBrO < HBrO < HBrO 2 3 4 HBrO < HBrO < HBrO < HBrO 2 4 3 HBrO < HBrO < HBrO < HBrO 4 3 2 HBrO < HBrO < HBrO < HBrO 2 3 4 HBrO < HBrO < HBrO < HBrO 4 2 3 1 / 1 pts Question 5

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10/5/22, 8:07 PM Chapter 14 - Acids and Bases: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198736 4/8 Which of the following acids will have the strongest conjugate base? HNO 3 HI HCN HClO 4 HCl 1 / 1 pts Question 6 What is the pH of pure water at 40.0°C if the K at this temperature is 2.92 × 10 ? w -14 7.000 7.233 8.446 6.767 0.465 1 / 1 pts Question 7 Calculate the hydronium ion concentration in an aqueous solution with a pH of 9.85 at 25°C.

10/5/22, 8:07 PM Chapter 14 - Acids and Bases: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198736 5/8 7.1 × 10 M -5 8.7 × 10 M -10 4.2 × 10 M -10 6.5 × 10 M -5 1.4 × 10 M -10 1 / 1 pts Question 8 Determine the pH of a 0.023 M HNO solution. 3 12.36 2.30 1.64 3.68 2.49 1 / 1 pts Question 9 Determine the pOH of a 0.00598 M HClO solution. 4 6.434 7.566

10/5/22, 8:07 PM Chapter 14 - Acids and Bases: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198736 6/8 11.777 2.223 3.558 1 / 1 pts Question 10 Determine the K of an acid whose 0.294 M solution has a pH of 2.80. a 5.4 × 10 -3 2.7 4.9 × 10 -7 8.5 × 10 -6 1.2 × 10 -5 1 / 1 pts Question 11 Determine the [OH ] concentration in a 0.169 M Ca(OH) solution. 2 2.96 × 10 M -14 0.298 M 0.169 M 5.92 × 10 M -14

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10/5/22, 8:07 PM Chapter 14 - Acids and Bases: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198736 7/8 0.338 M 1 / 1 pts Question 12 Determine the pH of a 0.188 M NH solution at 25°C. The K of NH is 1.76 × 10 . 3 b 3 -5 11.260 8.520 2.740 5.480 12.656 1 / 1 pts Question 13 Determine the K for CN at 25°C. The K for HCN is 4.9 × 10 . b a -10 2.3 × 10 -9 4.9 × 10 -14 1.4 × 10 -5 3.7 × 10 -7 2.0 × 10 -5

10/5/22, 8:07 PM Chapter 14 - Acids and Bases: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198736 8/8 1 / 1 pts Question 14 Determine the pH of a 0.62 M NH NO solution at 25°C. The K for NH is 1.76 × 10 . 4 3 b 3 -5 9.27 2.48 11.52 9.45 4.73 1 / 1 pts Question 15 Identify the strongest acid. H Te 2 H Se 2 H O 2 not enough information is available H S 2 Quiz Score: 15 out of 15