Lesson #2: Definition.
Aim :How are acids and bases defined?
Standard
: Overview the performance
S5-a, S5-c, S6-c, S7-d, S8-a
Ojectives: Students are able to
-explain the Arrhenius definition of acids and bases
-apply the Bronsted-Lowry definition to identify acids and bases
Motivation: Show students five bottles of different acids.
hydrochloric acid, nitric acid, sulfuric acid, vinegar
Tell students to write the formulas on chalk board
Ask students what do these acids have in common
Students will see all the acids contain hydrogen ions.
Show students four bottles of bases
sodium hydroxide , potassium hydroxide,
calcium hydroxide, aqueous ammmonia
Ask students what do these bases have in common.
Development : Click the site Arrhenius acids and bases.
Explain the Arrhenius Model of acids and bases.
Click the site Bronsted-Lowry acids and bases.
Explain the Bronsted-Lowry definitions
Click Acid and Base Theory.
Recall the definitions, make sure students understand.
Click Classwork #2
An exercise in class.
Answer #1 and #2. Decide an acid or a base.
Homework #2 : Read Review Book
Neutralization, page 143, Titration, page147
Answer question #24 through #28, page 146.