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Acids, Bases and pH. Indicators. A substance that changes color in the presence of an acid or a base. pH foldable notes. Cut along dotted lines then Fold up Bottom folds. The pH (parts Hydrogen ion) Scale is used to measure how acidic or basic something is. Acids . Neutrals.

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Presentation Transcript
indicators
Indicators
  • A substance that changes color in the presence of an acid or a base
ph foldable notes
pH foldable notes

Cut along dotted lines then Fold up Bottom folds

The pH (parts Hydrogen ion) Scale is used to measure how acidic or basic something is

Acids

Neutrals

Bases(Alkaline)

The pH scale Ranges from 0 to 14

0 1 2 3 4 5

*O is a strong Acid

*5 is a weak Acid

6 7 8

*7 is a pure neutral substance

  • 10 11 12 13 14

*9 is a weak base

*14 is a strong base

ph foldable notes1
pH foldable notes

Fill in the following on your foldable

Acids

Neutrals

Bases

  • Turn Blue litmus paper red
  • Taste Sour
  • React with metals to form hydrogen gas

Examples:

  • Do not change color of litmus paper.
  • When a base and an acid are mixed they produce neutral H2O & salt (Neutralization)
  • Turns Red litmus paper blue
  • Tastes bitter
  • Slippery to the touch

Examples:

ph and biological systems
pH and Biological Systems
  • Different organisms live well in different pH’s.
  • For example, bacteria in our stomach live well in an acidic environment.
  • Enzymes, which control all the reactions in living organisms work at different pH levels.
  • When the pH is changed this can have dramatic affect on those organisms.
  • Biological molecules can often keep the change from being too drastic.
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