1. Hint: Look at your charts on the pink worksheet
OBJECTIVES:
Tell what the pH is for acids, bases, & neutrals.
Describe the basic differences between acids & bases.
Warmup:
pH 2, acid or a base?
pH 10, acid or a base?
Hint: Look at your charts on the pink worksheet

2. LET'S EXPLORE pH !
Visit the following websites to explore and learn about pH.
Worksheet Activity 1
Worksheet Activity
Activity 3 (Use online lab journal & back of worksheet)

3. (Also tell which paragraph your answer came from.)
What is pH?
Read What is pH? Answer the 10 question on your own notebook paper using complete sentences.
(Also tell which paragraph your answer came from.)

4. Vocabulary pH: potential of hydrogen
Copy the definitions below into your vocabulary section.
(*Purple part goes in 3rd box)
pH: potential of hydrogen
Acids: A substance that contains many hydrogen ions, a pH lower than 7.0.
Bases: A substance that contains many hydroxyl groups, has a pH higher than 7.0
Hydroxyl Groups: An oxygen atom combined with a hydrogen atom, also called hydroxide ions
pH Indicators: Indicates the pH of a substance by turning a different color for each pH. Examples: litmus paper, cabbage juice, electronic test meters.

5. Interactive pH website
Acids, Alkalis and Neutralisation
Complete all 3 activities

6. 1. What causes a substance to be acidic?
2. What causes a substance to be basic?
3. Why is water neutral?
4. If you have acid indigestion why does antacid help you feel better?
5. What is an indicator?
(Sections 2)
A substance is considered to be an acid when it has many hydrogen atoms. (pH is between 1 and 6.9)
(Sections 2)
A substance is considered to be basic when it contain a combination of hydrogen and oxygen atoms called hydroxyl groups. (pH is between 7.1 and 14)
(Section 3)
Water is neutral because it has an equal number of hydrogen (H) and hydroxyl (OH) groups. (pH of 7)
(Section 4)
Antacids make you feel better because they are a base and they help raise the pH of your acid stomach towards neutral.
(Section 5)
An indicator is used to test the pH of a substance.

7. 6. Give three examples of indicators:
7. Why should you brush your teeth more than once daily?
8. What is another word for basic substances ?
9. How many times more acidic is a pH 4 compared to pH 7 ?
10. What question(s) do you still have about pH ?
(Sections 5& 6)
Examples of indicators are litmus paper, Bromothymol blue, grape juice, cabbage juice, and some purple flowers.
(Section 4)
You should brush your teeth more than once daily because the base toothpaste neutralizes the mouth and kills the bacteria that causes cavities, but soon the effect wears off and the bacteria return.
(Section 3)
Another word for a basic substance is alkaline.
(Section 5)
A pH 4 is 1000 times more acidic than pH 7 because the pH scale changes by powers of ten.

8. BRAINPOP
The pH Scale
BrainPOP | pH Scale

9. Acids & Bases

10. Discovery Education Natural Acids & Bases
The pH in the Chemistry of Nature

11. Interactive pH website
BrainPop Activity
Acid
Neutral
Base
Slippery
Dissolves Metal
H O 2
Bitter
Tastes Sour
NaCl (Salt)
Releases OH-
Releases H+
Soap
Lemons
Interactive pH website
Acids, Alkalis and Neutralisation
Complete all 3 activities

12. Acids and Alkalis in Our Daily Lives
Fill-in-the-Blank
Complete the “Acids & Alkalis in Our Daily Lives” worksheet (On back of BrainPop Activity worksheet) as you fill-in-the-blanks at the following link:
Acids and Alkalis in Our Daily Lives
When you’re finished try these fill-in-the-blanks online:
Use of Indicators
Neutralisation
Acids
Strong Acids
Faces of science:: Do You Know Your Bubbles?
(After filling in bubbles, click NEXT one time)