Chem 112 test 3

Chem 112 test 3 - Chem 112 Test 3 Spring 2008 Name 1 If...

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

View Full Document Right Arrow Icon
Chem 1 12 - Test 3 Spring 2008 ' Name 1. If 0.10 moles of KF dissolves in enough water to make 500 mL solution then (20 pts) k 3 f - H+ a. What ions are found? I I L b. If any of the ions are acids andlo ases identify them, and provide Ka or Kb values. - - &f e- o-I/ c. What is the pH of the solution? I=-+&&+ #C+OU/ K b : b ~ x / 6 % z2-, xc l0IJ6 - Jr . l a b 0 / =- < - %a Z X *2-X 2 & -3-2 L LO^= 1.67~16~ 2. Consider two weak acids HA (Ka = 6.1 x 1 0 3 and &3 (Ka = 7.9 x (12 pts) a. The stronger of the two weak acids is A P &..- 7 td_ - b. 0.10 M solutions of HA and HI3 were pre ared. The ~8 solution. H ~ L c. 0.01 M solutions of NaA and NaB were prepared. Both solutions were basic. The solution with the higher pH is the N.8 solution. 8-LJ sb. u & r e d h a A- 4 b ~ b j ' c t huX' "a /rwr ~'cbncc&d&, , i(i br X . d a 3. Consider the following titration curves 11s r.u'- I r Answer true or false for the following questi d. X-' is a weak base - on: (3 pts each) a. HX is a strong acid e b. HZ is a strong acid False c. HY is a weak base F ~ / s c e. the Ka value for is geater than 3.16 x 10" 7~ f. the pKa value for HY is greater than 7 f- g. The initial concentration of
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