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Questão 1
Questão
Acid rain is created when acidic substances, such as sulfur dioxide, are released into and mix with the atmosphere.
Responda
- True
- False
Questão 2
Questão
Acids have a pH of
Responda
-
less than 7
-
more than 7
-
4 or less
-
no more than 1
Questão 3
Questão
Distilled water has a pH of 7. Therefore, on the pH scale, water is
Responda
-
strongly basic.
-
mildly acidic.
-
neutral.
-
alkaline.
Questão 4
Questão
A _____________ resists changes in pH. It is composed of an acid-base pair, and can be used to "protect" other substances from changes in pH.
Responda
-
conjugate formula
-
buffer solution
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basic indicator
-
(none of the above)
Questão 5
Questão
__________ is the process used to determine buffering capacity (how much of an acid or base has to be added before buffers are no longer effective).
Responda
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Titration
-
Burette
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Buffer testing
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Indication
Questão 6
Questão
Buffers work because they dissociate so completely in water, they acidify the substance, offsetting the addition of any bases.
Responda
- True
- False
Questão 7
Questão
To create a buffer in an acidic substance, you should add a conjugate base. This forms an acid-base pair.
Responda
- True
- False
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