Class Notes Jan 22

# Class Notes Jan 22 - Announcements Friday Homework...

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

1/22/2010 1 Announcements: Friday, January 22, 2010 Homework WebAssign #3- Due Wednesday, January 27 at 8:00 AM CLASS Survey Must be completed online by TODAY at 5:00 PM Recitation Week 2- “Equilibrium-Weak and Strong Acids” ** Monday recitation sections- Please attend another session this week! ** Lab Next Week Lab Familiarization and Lab Check-In ** Monday lab sections will check in week 3.** Suggested Textbook Questions Complete Chapter 18 problems. What is the pH for a 1x10 -3 M NaOH(aq) solution at 25ºC? K b (OH - ) >> 1 January 22, 2010 - CT#1 A. 3.0 B. 7.0 D. 14.0 E. Not enough information C. 11.0 OH - is a strong base! Kw = [H 3 O + ][OH - ] = 1x10 -14 [H 3 O + ] = 1x10 -11 & pH = 11.0 BASIC! Relative Acid Strength HA + H 2 O ( l ) A + H 3 O + 1/K a (HB)= [HB] [B ][H 3 O + ] B + H 3 O + HB + H 2 O( ) K a (HA)= [A ][H 3 O + ] [HA] HA + B A + HB Net: Reacting acid Produced acid If K a (HA) > K a (HB), HA is a stronger acid than HB, then K net > 1 and the reaction goes to the right! K net = [A ][HB] [HA][B ] K a (HA) K a (HB) = The stronger acid dissociates and the weaker acid is formed.

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 2

Class Notes Jan 22 - Announcements Friday Homework...

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

View Full Document
Ask a homework question - tutors are online