1. Do Now: Define the following words on your vocabulary sheet: Constants
Covalent Bond
Dependent Variable
Elements
Hydrogen Bond
Hypothesis
Independent Variable
Ionic Bond
Problem Statement

2. Acids and Bases

3. When we think of acids and bases, we tend to think of chemistry lab acids and bases like
But we are surrounded by acids and bases in the world. Most of them are weak.

4. Acids cause…
Lemons to be sour

5. Acids cause…
Cavities in your teeth

7. acids
Turn blue litmus paper red

8. acids
form hydrogen ions (H+) in water

10. Taste bitter
Feel slippery
Don’t react w/ carbonates
bases

11. Bases turn red litmus paper blue.

12. bases
form hydroxide (OH-) ions in water

15. strengths of acids & bases
refers to how well an acid or base separates into ions in water

17. pH scale ranges from 0 – 14 pH < 7 acid pH = 7 neutral
pH > 7 base
pH Scale song

18. Strength of Acids & Bases
Very Acidic = 0 < pH < 3
Slightly Acidic = 3.1 < pH < 6.9
Very Basic = 12 < pH < 14
Slightly Basic = 7.1 < pH < 11.9

19. neutralization reaction between an acid & base produces water & a salt
an ionic compound

20. Check for understanding
Bleach has a pH of 12.5, which means that it is ________________
a. slightly acidic. c. slightly basic.
b. very acidic. d. very basic.

21. acid or base?
tastes sour
forms hydroxide ions in water
pH= 8
reacts with metals to produce H gas
feels slippery
turns red litmus paper blue

22. Acids & Bases A reaction between an acid and a base is a __ reaction.
The pH of a neutral solution is __.
The products formed when a base reacts with an acid are __ and __.
The symbol for a hydrogen ion is __ and the symbol for a hydroxide ion is___.