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- A reaction between an acid and a base
- An acid-base mixture is not as acidic or basic as the individual starting solutions
If a substance has a pH of 8.0 and you want to lower the pH, you have to add acid to it.

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- Measures how acidic or basic a solution is
- Ranges from 0-14
- Acidic solutions have pH values below 7
- A solution with a pH of 7 is neutral
- Basic solutions have pH values above 7

Draw this pH scale into your notebook.

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- Soaps
- Ammonia
- Cleaning products
- Blood
- Chalk

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- Feels slippery
- Tastes bitter
- Corrosive
- Can conduct electricity
- Turns red litmus paper blue

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- A solution that has an excess of OH- ions
- Another word for base is "alkali"
- Accept hydrogen ions

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- Lemons, limes, oranges
- Vinegar
- Sour candies
- Car batteries

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- Tastes sour
- Conducts electricity
- Corrosive
- Reacts strongly with metals
- Turns blue litmus paper red

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- A solution that has an excess of H+ ions

- Means "sharp" or "sour" in Latin
- The more H+ ions present, the more acidic the solution

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How are acids and bases used in everyday life?