Take Test: Lab 9 Post-lab Quiz Test InformationDescriptionInstructionsMultiple

Take Test: Lab 9 Post-lab Quiz
Test InformationDescriptionInstructionsMultiple
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QUESTION 1

-A congugate pair is an acid-base couple that only differs by one proton.
-True
-False
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10 points
QUESTION 2

-Based upon the pH scale of 1 to 14:
-A pH of 7 is neutral
-A pH of 14 is very acidic
-A pH of 1 is very basic
-All the above are correct.
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10 points
QUESTION 3

-Acids naturally present in food are generally safe to eat because they are usually:
-Concentrated
-Dilute
-Weak
-Strong
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10 points
QUESTION 4

-Acids are bitter and slimy.
-True
-False
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10 points
QUESTION 5

-Which of the following substances is most acidic?
-Cow’s milk – pH 6.6
-Apple juice – pH 3.0
-Tomato juice – pH 4.5
-Distilled water – pH 7.0
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10 points
QUESTION 6

-A buffer is a substance that:
-Converts alkaline solutions to acidic solutions.
-Converts acidic solutions to alkaline solutions.
-Resists changes in pH with the addition of small amounts of acids or bases.
-Alters the pH significantly with the addition of small amounts of acids or bases.
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10 points
QUESTION 7

-Which of the following are true regarding buffer capacity?
-When all of the available acid or base in the buffer solution has reacted with the acid or base added, the pH will begin to significantly change.
-Beyond the buffer capacity, the solution will not be able to maintain the pH as the acid or base is added.
-It is the maximum amount of strong acid or base that can be added to the solution before a significant change in pH will occur.
-All of the above are true regarding buffer capacity.
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10 points
QUESTION 8

-Which acid base theory defines an acid as a proton donor and a base as a proton acceptor?
-Arrhenius Theory
-Bronsted-Lowery Theory
-Conjugate Pairs Theory
-Lewis Theory
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10 points
QUESTION 9

-How does a solution of pH 7 compare to a solution of pH 10?
-pH 7 has more OH- ions
-pH 7 is more basic
-pH 7 has a higher pH
-pH 7 has more H+ ions
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10 points
QUESTION 10

-Which of the following is not an example of a neutralization reaction?
-HCl + NaOH –> NaCl +H2O
-2 NaOH + H2CO3 –> Na2CO3 +2 H2O
-H2SO4 + 2 NH4OH –> (NH4)2SO4 + 2 H2O
-2 AgNO3 + Zn –> 2Ag +Zn(NO3)2
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10 points
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