Chem 102 - General Chemistry II » Summer 2021 » Quiz 2

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Question #1
In the Arrhenius concept, what substance, when dissolved in water, increases the concentration of the hydronium-ion?
A.   Catalyst
B.   Acid
Question #2
Experimentally, it is found that all neutralizations involving strong acids and strong base have the same ΔH° (-55.90 kJ/mole of hydronium-ion), which indicates that the same reaction occurs in each neutralization.
A.   TRUE
B.   FALSE
Question #3
In the Bronsted-Lowry concept, how is an acid defined?
A.   Substance that accepts an electron pair
B.   Substance that accepts protons
C.   Substance that donates protons
Question #4
In the Lewis concept, how is a base defined?
A.   Substance that donates protons
B.   Substance that accepts an electron pair
C.   Substance that donates an electron pair
Question #5
What is an amphiprotic species?
A.   Substance that donates protons, substance that accepts protons, and substance that behaves as an acid or a base
B.   Substance that accepts protons and Substance that behaves as an acid or a base
C.   Substance that behaves as an acid or a base
D.   Substance that donates protons
Question #6
What is the conjugate-acid to HSO4–? 
A.   H4SO4
B.   H2SO4
Question #7
Which are conjugate-pairs?
A.   H2O and H3O+ , H2O and OH–, & HClO4 and BrO4–
B.   HClO4 and BrO4–
C.   H2O and H3O+ & H2O and OH–
Question #8
Consider the reaction: H2S + CN– <===> HS– + HCN. If H2S is a stronger acid than HCN, which direction do you predict the reaction to go? 
A.   Reactions moves in the forward direction
B.   Neither direction
C.   There is not enough information to predict
D.   Reaction moves in the reverse direction

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