Chem 102 - General Chemistry II » Winter 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.   Ion
B.   Acid
C.   Alkaline
D.   Minerals
Question #2
True or False? 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.   FALSE
B.   TRUE
Question #3
In the Bronsted-Lowry concept, how is a base defined? 
A.   Substance that accepts an electron pair
B.   Substance that donates protons
C.   Substance that accepts protons
D.   Substance that donates protons, accepts protons and accepts an electron pair
E.   Substance that donates protons and accepts protons
Question #4
In the Lewis concept, how is a base defined? 
A.   Substance that accepts an electron pair
B.   Substance that donates an electron pair
C.   Substance that donates protons
D.   Substance that accepts and donates an electron pair and donates protons
E.   Substance that accepts an electron pair and donates an electron pair
Question #5
What is an amphiprotic species? 
A.   Substance that accepts protons
B.   Substance that donates and accepts protons and behaves as an acid or a base
C.   Substance that behaves as an acid or a base
D.   Substance that donates and accepts protons
E.   Substance that donates protons
Question #6
What is the conjugate-acid to NH3? 
A.   H2SO4
B.   NH2
C.   HCO3
D.   NH4+
Question #7
Which are conjugate-pairs?  
A.   H2Te and HI and H2CO3 and HCO3–
B.   H2Te and HI, HClO4 and BrO4– and H2CO3 and HCO3–
C.   HClO4 and BrO4–
D.   H2CO3 and HCO3–
E.   H2Te and HI
Question #8
Consider the reaction: H2S + CN– <===> HS– + HCN.  If CN– is a stronger base than HS–, which direction do you predict the reaction to go? 
A.   Reaction moves in the reverse direction
B.   There is not enough information to predict
C.   Reactions moves in the forward direction
D.   Neither direction

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