quiz3dvb - Version 302 Quiz 3 VANDEN BOUT (53585) 1 This...

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: Version 302 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 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. 5.6 correct 2. 4.7 3. 9.0 4. 6.8 5. 5.9 Explanation: 002 10.0 points The ionization constants for an imaginary weak acid H 3 A are K 1 = 1 . 10- 3 , K 2 = 1 . 10- 7 , and K 3 = 1 . 10- 11 . Would a water solution of NaH 2 A be acidic, basic, or neutral? Hint: Write the chemical equa- tion and the equilibrium constant for the two possible reactions. 1. basic because of the hydrolysis of H 2 A- 2. acidic because of further ionization of H 2 A- correct 3. neutral 4. acidic because of the hydrolysis of H 2 A- 5. basic because of the further ionization of H 2 A- Explanation: H 2 A- H + + HA 2- K 2 = 10- 7 H 2 A- + H 2 O H 3 A + OH- K b3 = K w K a1 = 10- 14 10- 2 = 10- 11 003 10.0 points What is the molar solubility of CaF 2 ? ( K sp = 3 . 9 10- 11 .) 1. 3 . 4 10- 4 2. 3 . 9 10- 11 3.3....
View Full Document

This test prep was uploaded on 04/12/2008 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.

Page1 / 3

quiz3dvb - Version 302 Quiz 3 VANDEN BOUT (53585) 1 This...

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