AcidsBases

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Acids/Bases
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• Water is able to act as an acid or a base
• Water is amphoteric, which means it can act as an
  acid or a base

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Acids

• Produce H ions

Turn blue litmus paper red (acids / red)
Are electrolytes (conductive)
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Acids

• Have a pH of less than

Taste sour
Chemical property
Reacts with most metals and carbonates
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Examples

• Stomach acid

Lemons
OJ
Vinegar
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Bases

• Produce OH- ions

Have pH greater than.
Turn red litmus paper blue (bases / blue)
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Bases

• Feel slippery

Have a bitter taste
Conductive
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Examples
Soap
Ammonia
Baking Soda
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Indicators

• indicators are dyes
• turn colors with acids and bases
• indicators are qualitative data (can be
  quantitative for pH)

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Types of Indicators

• Litmus paper
• turns red or blue
• 2. pH paper
• universal indicator
• turns many colors
• 3. Phenolphthalein
• turns PINK in a base

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pH paper

• Acids turn pH paper RED
• Bases turn pH paper BLUE
• Neutral substances turn pH paper GREEN

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pH scale

• pH scale is based
• on H1 ion
• concentration
• On a scale of
• 0 to 14

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Acids and Bases

• Acids have hydrogen (H) or
• hydronium (H3O)
• 2. Bases have hydroxide (OH)

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Identify each as an acid or base according to
Arrhenius

• HCl
• 2. H3PO4
• 3. NaOH
• 4. Ca(OH)2

acid
acid
base
base