230_Sp10_L20_post - CHEM 230 Sp10 Lecture 20 Chapter 10:...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEM 230 Sp10 Lecture 20 Chapter 10: Acids and Bases 1) Acid Strength 2) Strong acid/base pH/pOH; 3) Weak acid/base pH/pOH; Session ID 230
Background image of page 1

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

View Full DocumentRight Arrow Icon
Predicting Acid Strength Acid strength: HI > HBr > HCl> HF HF > H 2 O >> H 3 N >>> CH 4
Background image of page 2
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
HClO 2(aq) + H 2 O (l) H 3 O + (aq) + ClO 2 - (aq) K a = H 3 O + [ ] ClO 2 " [ ] ( ) HClO 2 [ ] ClO 2 - (aq) + H 2 O (l) HClO 2(aq) + OH - (aq) K b = OH " [ ] HClO 2 [ ] ( ) ClO 2 " [ ] 2 H 2 O (l) H 3 O + (aq) + OH - (aq) K w = K a *K b Add equations (multiply K a * K b ) = [H 3 O + ][OH - ] = K w K a is the equilibrium constant for an acid donating a proton to water to form its conjugate base. K b is the equilibrium constant for a base accepting a proton from water to form its conjugate acid. pK a =-logK a pK b =-logK b
Background image of page 5

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

View Full DocumentRight Arrow Icon
Concept Question Consider 0.1 M concentrations of the acids in table. Which answer shows the weak acids arranged in order of increasing [H 3 O + ]? A) HF < HIO 3 < HNO 2 B) HNO 2 < HF < HIO 3 C) HIO 3 < HNO 2 < HF D) HF < HNO 2 < HIO 3 HA (aq) + H 2 O (l) A - (aq) + H 3 O + (aq)
Background image of page 6
Concept Question Consider 0.1 M concentrations of the acids in table. Which answer shows the weak acids arranged in order of increasing [H 3 O + ]? A) HF < HIO 3 < HNO 2 B) HNO 2 < HF < HIO 3 C) HIO 3 < HNO 2 < HF D) HF < HNO 2 < HIO 3 HA (aq) + H 2 O (l) A - (aq) + H 3 O + (aq) Higher K a stronger acid; more dissociation
Background image of page 7

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

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/24/2012 for the course PCHEM 230 taught by Professor Gottfried during the Fall '11 term at University of Michigan.

Page1 / 21

230_Sp10_L20_post - CHEM 230 Sp10 Lecture 20 Chapter 10:...

This preview shows document pages 1 - 8. Sign up to view the full document.

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