1. Bell Work! Which items have you never heard of?
Pick up a handout from the front lab table and begin discussing the items with your group.
Which items have you never heard of?
Which items do you like?
Which items do you not like?

2. Is it an acid…or a base?!
Around the room, there are a variety of “unknown” substances.
At each item (station), read the directions VERY CAREFULLY.
Some directions will require you to touch the substance…or smell the substance…or observe the substance…or taste the substance.
Some things should not be put in your mouth so be VERY CAREFUL.
Complete the task by reading the directions then make a prediction.

3. Is it an acid…or a base?! Today’s Goal:
Identify the properties of acids and bases.
By the end of class today, you should be able to…
List 3 properties of acids.
List 3 properties of bases.
Identify uses for acids.
Identify uses for bases.

4. Acids and Bases
Chapter 14
Title of page 81

5. Properties of acids…

6. Yellow areas on your teeth is acid erosion of the tooth enamel.

7. Acid Burn

8. What is an acid?
ACID: compound that increases the number of hydronium ions (H+ or H3O+) and it has a pH less than 7
Examples: lemons, soda, milk, acid rain

9. Properties of bases…

11. Base Burn

12. What is a base?
BASE: compound that increases the number of hydroxide ions (OH-) and has a pH greater than 7
Examples: Sea water, soap, cleaners

13. Properties of Acids and Bases:
Sour
Bitter
Changes color in an indicator
Feels slippery
React with metals (corrosive)
Conducts an electric current
pH > 7
pH < 7

14. Let’s race!
Sally bit into a food that tasted very sour. Sally is probably eating…
ACID

15. Let’s race!
John spilled his bottle of Coke. John probably cleaned up his mess with…
BASE

16. Let’s race!
John spilled his bottle of Coke. John’s Coke is an example of…
ACID

17. Let’s race!
Darla wanted her jeans to look like the 1980s. Darla could use bleach to fix them up. Bleach is an example of…
BASE

18. Let’s race!
Coach Harris created a huge mess by mixing vinegar and baking soda. The baking soda is an example of…
BASE

19. Let’s race!
Jamal created a huge mess by mixing vinegar and baking soda. The vinegar is an example of…
ACID

20. Let’s race!
After testing the unknown substance, Jake knew his liquid was a _____ because the pH was 2.
ACID

21. Prediction Chart
Look at your prediction chart and correctly identify if each of the items on your list is an acid or a base.
How many did you get right the first time?
Were any “shocking” to you?

22. I can… List at least 3 differences between an acid and a base.
Give at least 3 examples of an acid and a base.