Attempt 2 - View Attempt...

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

View Full Document Right Arrow Icon
View Attempt 2 of unlimited Title: Chapter 19(1) Started: November 8, 2009 6:55 PM Submitted: November 8, 2009 7:41 PM Time spent: 00:46:16 Total score: 8/12 = 66.67% Total score adjusted by 0.0 Maximum possible score: 12 1. Buffer Synthesis 5 Match the acid/base pair that is suitable for preparing a buffer of each given approximate concentration. You will need to refer to Tables in the book of weak acids and bases and polyprotic acid C 6 H 5 NH 2 / C 6 H 5 NH 3 Cl NaH 2 AsO 3 /Na 2 HAsO 3 NH 3 /NH 4 Cl [H 3 O + ] = 10 -4 [H 3 O + ] = 10 -9 [H 3 O + ] = 10 -7 Statement Response Value Correct Match C 6 H 5 NH 2 / C 6 H 5 NH 3 Cl [H 3 O + ] = 10 -7 Incorrect [H 3 O + ] = 10 -4 NaH 2 AsO 3 /Na 2 HAsO 3 [H 3 O + ] = 10 -4 Incorrect [H 3 O + ] = 10 -7 NH 3 /NH 4 Cl [H 3 O + ] = 10 -9 Correct [H 3 O + ] = 10 -9 Score: 0/1 2. Indicator 5 Which indicator would be the best to use for a titration between 0.10 M HF with 0.10 M NaOH? You will probably need to consult the appropriate table in the book. Student Response Value Correct Answer Feedback 1. thymol blue, color change at pH 8-10 100% 2. bromothymol blue, color change at pH 6-8
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