CheatSheet9 - CH204 Spring 2009 Cheat Sheet for Experiment...

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

View Full Document Right Arrow Icon
CH204 Spring 2009 Cheat Sheet for Experiment 9. Acid-Base Equilibria 1 Part 3. The Ionization Constant of Acetic Acid Solution: 10 ml of 1.5 M CH 3 COOH Measured: pH To be determined: K a Calculations: 1. x = = - + pH 3 10 ] O H [ 2. Determine [CH 3 COO ] and [CH 3 COOH] from the following: CH 3 COOH + H 2 O CH 3 COO + H 3 O + 1.5 0 0 initial –x x x change (1.5 – x) x x equilibrium 3. ) 5 . 1 ( ] COOH CH [ ] COO CH ][ O H [ K 2 3 3 3 a x x - = = - + Solution: 30 ml of 1.5 M NaCH 3 COO + 10 ml of 1.5 M CH 3 COOH CH 3 COOH + H 2 O CH 3 COO + H 3 O + ( reversible ) NaCH 3 COO CH 3 COO + Na + ( to completion ) Measured: pH To be determined: K a Assume that the equilibrium molarities of CH 3 COOH and CH 3 COO are the same as their initial molarities. However, keep in mind that the initial molarities decrease after the two solutions are mixed together (they dilute each other) Calculations: 1. pH
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/06/2009 for the course CH 204 taught by Professor Leytner during the Spring '08 term at University of Texas.

Page1 / 2

CheatSheet9 - CH204 Spring 2009 Cheat Sheet for Experiment...

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