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19 Cards in this Set
- Front
- Back
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What does the pKa of a
Weak acid equal? |
the pH at the volume half way to the equivalence Point.
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Is the change in pH near
The equivalence point of A weak/strong titration as Large as the change in pH Near the equivalence point Of a strong/strong titration? |
NO
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What has a greater titration
Error a strong/strong titration Or a weak/strong titration? |
a weak/strong titration has a greater titration error
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What is the pH at the
Equivalence point of a weak Acid with a strong base? |
pH > 7
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What is the pH at the
Equivalence point of a weak base with a strong acid? |
pH < 7
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What is an acid-base indicator?
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Acid-base indicators are substances whose color in
Solution depends upon the pH. They are complex Organic compounds of large molar mass that are Themselves weak acids or weak bases. |
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What are the uses of an
Acid-base indicator? |
1.) estimate the pH of an unknown solution
2.) determination of the end point in acid-base Titrations |
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What is the ratio of In- and HIn Determined by?
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the [H+] and Ka
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What is the transition range of An indicator?
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the transition range is the pH range that an indicator Will change within.
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What factors affect the Indicator?
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temperature, ionic strength, solvents other than
Transition range of a pH water, and colloidal particles. |
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What do oxidation-reduction
Reactions involve? |
the transfer of electrons.
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What happens to a species that Is oxidized?
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it loses electrons
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What happens to a species that Is reduced?
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it gains electrons
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Oxidizing agents cause oxidation But actually undergo what?
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they actually undergo reduction
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Reducing agents cause reduction But actually undergo what?
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they actually undergo oxidization
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What are some good oxidizing
Agents? |
Cl2, O2, and F2
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What are some good reducing
Agents? |
Li and Na
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What does a positive Eº
Voltage indicate? |
a spontaneous reaction
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What does a negative Eº
Voltage indicate? |
a non-spontaneous reaction
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