quiz3 - Version 193 Quiz 3 VANDEN BOUT(53585 This print-out...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Version 193 – Quiz 3 – VANDEN BOUT – (53585) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Which of the following mixtures gives a buffer with a pH less than 7.0? For acetic acid, K a = 1 . 8 × 10 - 5 and for NH 3 , K b = 1 . 8 × 10 - 5 . 1. 10 mL of 0.1 M aqueous acetic acid + 10 mL of 0.1 M NH 3 (aq) 2. 10 mL of 0.1 M aqueous acetic acid + 10 mL of 0.1 M NaOH(aq) 3. 10 mL of 0.1 M aqueous acetic acid + 5.0 mL of 0.1 M NaOH(aq) correct 4. 10 mL of 0.1 M NH 3 (aq) + 5.0 mL of 0.1 M HCl(aq) 5. 10 mL of 0.1 M NH 3 (aq) + 10 mL of 0.1 M HCl(aq) Explanation: 002 10.0 points What is the p K a of the acid titrated in this pH curve? 1 3 5 7 9 11 13 5 10 15 20 25 30 35 40 pH mL of OH - 1. 5.9 2. 4.7 3. 6.8 4. 5.6 correct 5. 9.0 Explanation: 003 10.0 points A 130 mL portion of 0 . 4 M acetic acid is be- ing titrated with 0 . 4 M NaOH solution. What is the pH of the solution after 120 mL of the NaOH solution has been added? The ioniza- tion constant of acetic acid is 1 . 8 × 10 - 05 .
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern