Chem 2 Chapter 16 - Exam #4 Sample Questions Chapter 16...

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

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Exam #4 Sample Questions Chapter 16 (some 15) Multiple Choice ____ 1. To make a buffer using acetic acid one would add A. carbonic acid. C. sodium chloride. E. ammonium phosphate. B. sodium acetate. D. ammonium chloride. ____ 2. Consider a buffer solution made up of H 2 PO and HPO . H 2 PO 4- (aq) + H 2 0 = HPO (aq) + H 3 + (aq) For H 2 PO 4- , K a = 6.2 x 10-8 . What mole ratio of HPO to H 2 PO will give a pH of 7.35? A. 0.14 to 1 B. 0.72 to 1 C. 1 to 1 D. 1.4 to 1 ____ 3. A buffer solution is 0.500 M in ascorbic acid and 0.500 M in sodium ascorbate. Its pH is 4.10. After adding NaOH until 1 liter of the buffer is also 0.01M in NaOH which of the following correctly estimates the new pH after the buffer does its work on the added NaOH ? A. 4.08. B. 4.10. C. 4.12. D. 3.95. E. 10.15. ____ 4. A buffer solution is 0.500 M in acetic acid and 0.500 M in sodium acetate. Its pH is 4.74. What is its pH after dilution by a factor of 2 that is making the solution 0.250 M in acetic acid and 0.250 M in sodium acetate?dilution by a factor of 2 that is making the solution 0....
View Full Document

This note was uploaded on 04/10/2008 for the course CHEM 1451 taught by Professor Krause during the Spring '08 term at University of Central Arkansas.

Page1 / 3

Chem 2 Chapter 16 - Exam #4 Sample Questions Chapter 16...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online