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Acids and Bases

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on 19 September 2014

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Transcript of Acids and Bases

Acids and Bases
pH Scale
Definition- measurement system used to indicate the concentration of hydrogen ions (H+) in solution:

Sentence: The pH scale ranges from 0-14.

Definition- compound that forms hydrogen ions (H+) in solution.
Sentence- Acids have a pH of 0-6

Defination - compound that produces hydroxide ions (OH-) in solution.
Sentence- Bases have a pH of 8-14
1.Solution: all components are evenly distributed
a. Solute = the substance that is dissolved
b. Solvent = the substance in which the solute dissolves
c. Example: Salt water
2.Suspension: mixtures of water and non-dissolved material
a. Example: blood contains undissolved particles, pudding

3.pH scale: indicates the concentration of H+ ions in solution
a. Ranges from 0-14
b. At pH 7, OH- and H+ ion concentrations are equal
c. Pure water is pH 7 (neutral)
d. pH above 7 is basic (8-14)
e. pH below 7 is acidic (0-6)

4. Buffers
a. Weak acids or bases that can react with strong acids and bases to prevent sharp, sudden changes in pH
b. Keeps pH between 6.5 and 7.5

Maintains homeostasis

Question of the day: How should a procedure be written?

Objecitve: Students will be able to write, test, and evaluate a procedure.
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