Exploring Acids and Bases

1
Exploring Acids and Bases

• What are the properties of acids and bases?
• Pages 90-95

2
Think About It

• Lemon juice is an acid.
• Soap is a base.
• Water is neither an acid nor a base.
• Think about it. Use the word bank to describe
  each property.
• Taste word bank bitter, none, sour
• Feel word bank burns, slippery, wet

3
Think Back

• Zn 2HCl ZnCl2 H2
• When a metal was added to an acid what gas was
  released?
• Zn 2NaOH Zn 2NaOH
• Is the same gas released? Did a reaction occur?
• Zn 2HOH Zn 2HOH
• Is the same gas released? Did a reaction occur?

4
Analyze This
Decide if the substance conducts electricity.
5
Lab Cautions

• Wear goggles while testing the chemicals.
• Do not taste the chemicals.
• Be careful not to spill the chemicals.

6
Litmus Test

• Dip a piece of blue litmus paper in the liquid
  labeled acid.
• Dip a piece of red litmus paper in the liquid
  labeled base.
• Dip a piece of red litmus paper in the liquid
  labeled water. Repeat using blue litmus paper.
• Write the results in the appropriate box of the
  table.

7
Carbonate Test

• Add a small amount of sodium bicarbonate to the
  liquid labeled acid.
• Add a small amount of sodium bicarbonate to the
  liquid labeled base.
• Add a small amount of sodium bicarbonate to the
  liquid labeled water.
• Was there a chemical reaction? Write the
  results in the appropriate box of the table.

8
Properties of Acids and Bases