Catalyst
Catalyst1. What is the equilibrium point?2. What exactly does
equilibrium mean?3. Can you find a situation in your body where
this exists?4. Grade yourselves in your learning logs for all
LTs
End
Lecture 6.6 Intro to Buffers
6.8 I can identify the conjugate acid and base in a chemical
reaction. 6.9 I can explain what a buffer is, draw a titration
curve for a buffered solution, and explain why these are essential
to maintaining life in humans. Todays Learning Target
What are conjugate acids and bases?
Conjugate Base The compound that remains after a Bronsted-Lowry
acid has given off its H+.Conjugate Acid The compound that is
formed when a Bronsted-Lowry base gains a H+.
HA + B A- + BH+I. Conjugate Acids and BasesIdentify the acid,
base, conjugate acid, and conjugate base:HBr + NaOH H2O + NaBr
Class Example
Identify the acid, base, conjugate acid, and conjugate
base:H2SO4 + KOH KHSO4 + H2O Table Talk
Identify the acid, base, conjugate acid, and conjugate base:HI +
NH3 NH4+ + I- Stop and Jot
What is equilibrium?
Weak acids and bases do not completely dissociate.This means
that they exist in equilibrium There are both reactant and products
present in a solution of weak acid or base.I. Weak Acid and Base
Equilibrium
Equilibrium
SUMMARIZE
Learning Log AssessmentRate yourself 1 4 on LTs 6.8 and 6.9
Which Card?Raise your tables card in the air for the category
that you think each compound belongs to.Your choices are:Bronsted
Lowry AcidBronsted Lowry BaseArrhenius AcidArrhenius BaseConjugate
AcidConjugate Base
Which Card?You run the following reaction:HCOOH + OH- COOH- +
H2O1. What is OH-?2. What is HCOOH?3. What is COOH-4. What is
H2O?Which Card?You run the following reaction:NH3 + HBr NH4+ +
Br-1. What is NH3?2. What is HBr?3. What is NH4+?4. What is
Br-?Which Card?You run the following reaction:HF + LiOH LiF + H2O1.
What is LiOH?2. What is HF?3. What is LiF?4. What is H2O?Review
StationsRotate between the 8 stations (9 for honors)
ROTATE!Station 1 LT 6.1Station 2 LT 6.2Station 3 LT 6.3Station 4
LT 6.4
Station 5 Calculating logsStation 6 LT 6.5Station 7 LT
6.6Station 8 LT 6.6
Honors Station 9 LT 6.8 and 6.9
Closing TimeTest on FridayRough Draft of Lab Report due
Tuesday
