1. Acids and Bases

2. When we think of the terms “acid” and “bases” we tend to think of chemistry lab acids and bases like:
However, we come into contact everyday with these items, at home, at school, at the beach, etc.

3. Acids cause…
Lemons to be sour

4. Acids cause…
Loss of tooth enamel

6. Acids
Taste sour
When acids and metals react, a salt and hydrogen (H) gas is produced
Has a pH value below 7
Are corrosive – destroy other materials

7. Turns blue litmus paper red
Acids
Turns blue litmus paper red

8. When added to water (H2O) lose a Proton and form hydrogen ions (H+)
Acids
When added to water (H2O) lose a Proton and form hydrogen ions (H+)

9. Bases Taste bitter Feel slippery Don’t react with metals
Strong bases can burn skin

10. Turns red litmus paper blue.
Bases
Turns red litmus paper blue.

11. Bases Has a pH value above 7
When added to water (H2O) gain a Proton and form hydroxide ions (OH-)

13. pH Testing

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

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

17. Universal indicator shows how acidic or alkaline a solution is

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

19. Review
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

20. ACID or BASE 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___.