BioChemistry > QUESTIONS & ANSWERS > Multiple Choice Exam Haces BioChem Test | questions and answers | 5 pages (All)

Multiple Choice Exam Haces BioChem Test | questions and answers | 5 pages

Document Content and Description Below

Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 2. Calculate the enthalpy of formation per mol of NH3. Bond energies: H2 ,436 kJ/mol... ; N2 , 945KJ/mol; H-N 391 kJ/mol. N2 + 3H2  2NH3 a. 1080kJ d. -1080kJ b. -93kJ e. - 46.5kJ c. 45kJ ____ 3. The Henderson-Hasselbalch equation applies a. only to acids d. to weak acids b. only to bases e. to very weak conjugated bases c. to strong acids ____ 4. If 0.01 M HCl is added to pure water, what is the [OH- ] in that solution? a. 1 x 10-7 d. 1 x 10 7 b. 1 x 10 12 e. 1 x 10 -2 c. 1 x 10-12 ____ 8. Which of the following would be the best in buffering capacity? a. 2M CH3COOH/ 2M CH3COO-Na d. 0.1M H2PO4 -1 and 0.1M HPO4 2- b. 1M PO4 3- and 1M HPO4 2- e. 5M H3PO4 and 5M H2PO4 1- c. 0.1M CH3COOH/ 0.1M CH3COO-Na ____ 9. What is the ratio of the weak acid, citric acid (pK1 = 3.09) to monosodium citrate in a 1.0 M citric acid solution with a pH = 2.09? a. 10:1 c. 1:10 b. 1:1 d. 1:11 ____ 12. Water is an acid and a base, therefore water is? a. amphiphilic c. can be either b. amphoteric d. polyprotic/polybasic [Show More]

Last updated: 2 years ago

Preview 1 out of 5 pages

Buy Now

Instant download

We Accept: