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Monday 5-6-13. Fill out planner for the week Note: the quiz on Wednesday is over properties of water, types of bonds, & pH. Update Journal Warm Up- Explain how to determine if a molecule is polar or nonpolar by looking at its structure. Check Homework. Acids, Bases and pH.

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monday 5 6 13
Monday 5-6-13
  • Fill out planner for the week

Note: the quiz on Wednesday is over properties of water, types of bonds, & pH.

  • Update Journal
  • Warm Up- Explain how to determine if a molecule is polar or nonpolar by looking at its structure.
  • Check Homework
ph foldable notes
pH foldable notes

Cut along dotted lines then Fold up Bottom folds

The Hydrogen ion (H+) is the basis of pH (parts Hydrogen ion) The Scale measures how acidic or basic something is.

Acids

Neutrals

Bases

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

water acids and bases
Water, Acids and Bases
  • Water can split into two ions:

H2O H+ + OH-

  • H+ or H3O+ is called a Hydronium Ion.
  • OH-is called hydroxide ion.
ph foldable notes1
pH foldable notes

Fill in the following on your foldable

Acids

Neutrals

Bases

  • Release H+ ions
  • The Higher the concentration of H3O+ (Hydronium ions) =‘s lower pH
  • Low concentration of OH- ions
  • H2O  H+ + OH-
  • Pure water Has equal amounts of hydronium (H+ or H3O+) and hydroxide (OH- ) ions
  • Release OH- ions
  • Contain a High concentration of OH- (Hydroxide) ions
  • Low concentration of H3O+ ions
slide7

Acids

  • Strong acids have
  • a pH of 1-3
  • Produce lots of
  • H+ ions
slide8

Bases

  • Strong bases have a
  • pH of 11 to 14
  • Contain lots of OH-
  • ions and fewer H+ ions
indicators top of page under title
Indicators(Top of page under title)
  • A substance that changes color in the presence of an acid or a base
ph foldable notes2
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.
slide13

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.
  • If human blood is not between a pH of 7.35 & 7.45 it:
    • causes acidosis when it is too acidic
    • And alkalosis when it is too basic
    • Both of which can be deadly
slide14

Most substances become more acidic if an acid is added to it and more basic if a base is added.

  • Buffers – substances that do not change pH when an acid or base is added to it.
  • Biological molecules can often keep the change from being too drastic.
to do
To Do:
  • Update SN
  • Worksheet
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