1. Chapter 9 Acids, Bases, and Salts
Lesson 3
Notes

2. Vocabulary
Acid – substance that tastes sour and turns blue litmus paper red.
Base – substance that feels slippery, tastes bitter, and turns red litmus paper blue.
Indicator – substance that shows whether an acid or base is present.
pH – system for measuring the strength of acids and bases.
Salt – what forms when a strong acid and a strong base react with each other. Typically made from and metal and nonmetal.

3. Acids and Bases
Acids, bases, and salts are special types of compounds.
Acids and bases have their own unique properties.
Acids Bases
Taste sour Tastes bitter
- Turn blue paper red Turns red paper blue
- Releases H Accepts H
Reacts easily Reacts easily
with bases with acids
We measure the strength and weakness of an acid or base by using a pH scale.
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4. Salts When an acid and a base react they form a salt.
Salts are typically formed from a metal and nonmetal.
Although we think of salt as NaCl (table salt) there are many different forms of salt.
You can find salts in many places, including ocean water, on your kitchen table, and on roads.

5. Let’s watch…

6. Time to think… How could you make a salt from other compounds?
Your friend tells you that your soda is an acid. You don’t believe him. Design an experiment that will prove to your friend that you are right. Include a control and a variable.