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