1. DRILL Quiz pH = - log (H+) What is the pH of 0.02 M Ca(OH)2?
What is the pH of 0.05 M Mg(OH)2?
pH = - log (H+)

2. OBJECTIVE
SWBAT:
Explore acids and bases in order to identify the differences between them.

3. SAT Enrichment
Define Lethal:
Deadly

4. WHAT IS THE DIFFERENCE B/W THEM!
ACIDS & BASES
WHAT IS THE DIFFERENCE
B/W THEM!

5. ENGAGEMENT 3 min Complete Word Web: Acids & Bases
Students are to pass the worksheet around within their groups.
Each student is to write something they know about an acid or a base.
This is a silent activity you can not tell your group member what to write.
3 min

6. Acid-Base Theories
Bracken Cave, near San Antonio, Texas, is home to twenty to forty million bats. Visitors to the cave must protect themselves from the dangerous levels of ammonia in the cave. Ammonia is a byproduct of the bats’ urine. You will learn why ammonia is considered a base.

7. Properties of Acids and Bases
Acids taste sour, will change the color of an acid-base indicator, and can be strong or weak electrolytes in aqueous solution.
Citrus fruits contain citric acid. Tea contains tannic acid.
Many items contain acids or bases, or produce acids and bases when dissolved in water. a) Citrus fruits contain citric acid. b) Tea contains tannic acid.

8. Properties of Acids and Bases
Bases taste bitter, feel slippery, will change the color of an acid-base indicator, and can be strong or weak electrolytes in aqueous solution.
Antacids use bases to neutralize excess stomach acid. The base calcium hydroxide is a component of mortar.
Many items contain acids or bases, or produce acids and bases when dissolved in water. c) Antacids use bases to neutralize excess stomach acid. d) The base calcium hydroxide is a component of mortar.

9. Arrhenius Acids and Bases
Arrhenius said that
Acids are hydrogen-containing compounds that ionize to yield hydrogen ions (H+) in aqueous solution.
Bases are compounds that ionize to yield hydroxide ions (OH–) in aqueous solution.

10. Arrhenius Acids and Bases
Hydrochloric Acid

11. Arrhenius Acids
Acids that contain one ionizable hydrogen, such as nitric acid (HNO3), are called monoprotic acids.
Acids that contain two ionizable hydrogens, such as sulfuric acid (H2SO4), are called diprotic acids.
Acids that contain three ionizable hydrogens, such as phosphoric acid (H3PO4) are called triprotic acids.

12. COMMON ACIDS

13. Arrhenius Bases
Hydroxide ions are one of the products of the dissolution of an alkali metal in water.

14. COMMON BASES

15. Arrhenius Bases
Milk of magnesia is a base used as an antacid.

16. Brønsted-Lowry Acids and Bases
The Brønsted-Lowry theory defines
an acid as a hydrogen-ion donor.
a base as a hydrogen-ion acceptor.

17. Why Ammonia is a Base

18. Conjugate Acids and Bases
A conjugate acid is the particle formed when a base gains a hydrogen ion.
A conjugate base is the particle that remains when an acid has donated a hydrogen ion.

19. Conjugate Acids and Bases
A conjugate acid-base pair consists of two substances related by the loss or gain of a single hydrogen ion.
A substance that can act as both an acid and a base is said to be amphoteric.

20. Conjugate Acids and Bases

21. Brønsted-Lowry Acids and Bases
A water molecule that gains a hydrogen ion becomes a positively charged hydronium ion (H3O+).

22. Lewis Acids and Bases Lewis proposed that
An acid accepts a pair of electrons during a reaction.
A base donates a pair of electrons.

23. Lewis Acids and Bases
A Lewis acid is a substance that can accept a pair of electrons to form a covalent bond.
A Lewis base is a substance that can donate a pair of electrons to form a covalent bond.

24. COMPARE THE 3
Compare the three important definitions of acids and bases.
ANIMATION

25. COMPARE THE 3

26. SHORT QUIZ 1. Which of the following is NOT a characteristic of acids?
taste sour
are electrolytes
feel slippery
affect the color of indicators

27. SHORT QUIZ
2. Which compound is most likely to act as an Arrhenius acid?
H2O
NH3.
NaOH.
H2SO4.

28. SHORT QUIZ 3. A Lewis acid is any substance that can accept
a hydronium ion.
a proton.
hydrogen.
a pair of electrons.

29. Inquiry Activity Purpose
Students observe the fruits and vegetables with sour or tart tastes react with baking soda to produce bubbles of Carbon dioxide gas.

30. Homework Introduction to acids/bases worksheet. Exit Ticket:
Complete your exit ticket and place it in the bin.

31. Summary Compare and Contrast Acids and Bases.
How do Acids taste? Give an example.
How do Bases taste and feel? Give an example.
What color does an indicator change for an acid, a base?
Which is an H donor? Which is an H acceptor?