Download E2 Review F06

Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) In an acid-base neutralization reaction 23.74 mL of 0.500 M potassium hydroxide reacts with
50.00 mL of sulfuric acid solution. What is the concentration of the H2SO4 solution?
A) 0.475 M
B) 2.11 M
C) 0.119 M
2) Which one of the following compounds is insoluble in water?
A) NaNO 3
B) PbSO 4
C) K2SO4
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D) 0.237 M
2)
D) Rb 2CO3
3) The reaction of HNO3(aq) + KOH(aq) → KNO3(aq) + H2O(l) is best classified as a(n)
A) precipitation reaction.
B) oxidation-reduction reaction.
C) acid-base neutralization reaction.
D) single replacement reaction.
3)
4) How many milliliters of 0.550 M hydroiodic acid are needed to react with 25.00 mL of 0.217 M
CsOH?
HI(aq) + CsOH(aq) → CsI(aq) + H2O(l)
A) 63.4 mL
B) 9.86 mL
C) 0.0158 mL
D) 0.101 mL
4)
5) What reagent would distinguish between Ag+ and Fe 3+?
A) NaI
B) NaOH
C) NaNO 3
5)
D) NaClO3
6) The mixing of which pair of reactants will result in a precipitation reaction?
A) NaClO4(aq) + (NH4)2S(aq)
B) Cu(NO 3)2(aq) + Na 2CO3(aq)
C) NH4Br(aq) + NaI(aq)
D) K2SO4(aq) + Cu(NO3)2(aq)
6)
7) Write a balanced net ionic equation for the reaction of CdCl2(aq) with Na2S(aq).
A) Cd2+(aq) + 2 Cl-(aq) + 2 Na+(aq) + S2-(aq) → CdS(s) + 2 Na+(aq)
7)
B) Cd2+(aq) + 2 Cl-(aq) + 2 Na+(aq) + S2-(aq) → CdS(s) + 2 NaCl(aq)
C) Cd2+(aq) + S2-(aq) → CdS(s)
D) CdCl2(aq) + Na 2S(aq) → CdS (aq) + 2 NaCl(aq)
8) What is the molar concentration of sodium ions in a 0.350 M Na3PO4 solution?
A) 1.05 M
B) 1.40 M
C) 0.117 M
D) 0.350 M
8)
9) The reaction of Cu(s) + 2 AgNO 3(aq) → Cu(NO3)2(aq) + 2 Ag(s) is best classified as a(n)
A) precipitation reaction.
B) oxidation-reduction reaction.
C) double replacement reaction.
D) acid-base neutralization reaction.
9)
10) Which one of the following compounds contains the smallest percent oxygen by mass?
A) P4O10
B) N2O4
C) CO2
D) SO2
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11) What is the empirical formula for ethyl fluoride if the compound contains 49.97% carbon, 10.51%
hydrogen, and 39.52% fluorine by mass?
A) C4H10F 4
B) C25F 2
C) C2H5F
D) C4H10F 2
11)
12) HBr, HCl, HClO4, KBr, and NaCl are all classified as
A) strong electrolytes.
B) acids.
C) nonelectrolytes.
D) weak electrolytes.
12)
13) The reaction of Pb(NO 3)2(aq) + K2SO4(aq) → PbSO4(s) + 2 KNO3(aq) is best classified as a(n)
A) precipitation reaction.
B) oxidation-reduction reaction.
C) acid-base neutralization reaction.
D) single replacement reaction.
13)
14) A compound responsible for the odor of garlic has a molecular weight of 146 g/mol. A 0.650 g
sample of the compound contains 0.321 g of carbon, 0.044 g of hydrogen, and 0.285 g of sulfur.
What is the molecular formula of the compound?
A) C3H5S
B) CH5S
C) C3H15S3
D) C6H10S2
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15) How many unpaired electrons are in an atom of Co in its ground state?
A) 7
B) 2
C) 1
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D) 3
16) How many orbitals are there in the seventh shell?
A) 21
B) 49
D) 6
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C) 7
17) What is the frequency of a helium-neon laser light with a wavelength of 632.8 nm? The speed of
light is 3.00 × 10 8 m/s.
A) 4.74 × 10 5 s-1
B) 4.74 × 10 14 s-1
C) 2.11 × 10 -15 s-1
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D) 1.58 × 10 -15 s-1
18) What is the ground-state electron configuration of Co?
A) [Ar]4s13d8
B) [Ar]3d9
C) [Ar]4s24p64d1
D) [Ar]4s23d7
18)
19) For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 4d
orbital to a 2p orbital in a hydrogen atom? The Rydberg constant is 1.097 × 10 -2 nm-1.
A) 656.3 nm
B) 2.057 × 10 -3 nm
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C) 486.2 nm
D) 364.6 nm
20) What are the possible values of n and ml for an electron in a 5d orbital?
A) n = 1, 2, 3, 4, or 5 and ml = -2, -1, 0, +1, or +2
B) n = 5 and ml = 2
C) n = 5 and ml = -2, -1, 0, +1, or +2
D) n = 1, 2, 3, 4, or 5 and ml = 2
2
20)
21) Based on the balanced chemical equation shown below, determine the molarity of a solution
containing Fe2+(aq), if 40.00 mL of the Fe 2+(aq) solution is required to completely react with
21)
30.00 mL of a 0.125 M potassium bromate, KBrO 3(aq), solution.The chemical equation for the
reaction is
6 Fe2+(aq) + BrO3-(aq) + 6 H+(aq) → 6 Fe 3+(aq) + Br-(aq) + 3 H2O(l)
A) 1.00 M
B) 0.0156 M
C) 0.562 M
D) 0.0938 M
22) What is the oxidation number change for the manganese atom in the following unbalanced
reduction half reaction:
MnO4-(aq) + H+(aq) → Mn2+(aq) + H2O(l)?
A) +5
B) +7
C) -5
D) -7
22)
23) The greater the energy of a photon, the
A) longer the wavelength and the higher the frequency.
B) shorter the wavelength and the higher the frequency.
C) shorter the wavelength and the lower the frequency.
D) longer the wavelength and the lower the frequency.
23)
24) Which of the following are allowed resonance forms of NCS-?
24)
A) only I
B) I and III
C) only II
D) only III
25) Of the following, which atom has the largest atomic radius?
A) Cl
B) Br
C) K
D) Na
26) What is the oxidation number of the sulfur atom in H2SO4?
A) +2
B) +4
C) -2
D) +6
27) Which element has the ground-state electron configuration [Xe]6s25d14f7?
A) Gd
B) Eu
C) Pt
D) Tb
28) What is the oxidation number of the oxygen atom in H2O2?
A) +2
B) -2
C) -1
D) +1
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29) Which is the most acceptable electron dot structure for carbonyl fluoride, COF 2?
A)
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C)
D)
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30) Which species functions as the oxidizing agent in the following reduction-oxidation reaction:
5 Fe2+(aq) + MnO 4-(aq) + 8 H+(aq) → Mn2+(aq) + 5 Fe3+(aq) + 4 H2O(l)?
A) MnO4-(aq)
B) H+(aq)
C) Mn2+(aq)
D) Fe 2+(aq)
30)
31) What are the coefficients in front of NO3-(aq) and Zn(s) when the following equation is balanced
in a basic solution:
___ NO 3-(aq) + ___ Zn(s) → ___ Zn 2+(aq) + ___ NO(g)?
A) 2, 3
B) 2, 5
C) 3, 4
D) 3, 2
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32) Of the following elements, which has the highest electronegativity?
A) P
B) S
C) As
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D) Sc
33) Determine the number of water molecules necessary to balance the following chemical equation
Cr2O72-(aq) + Cl-(aq) + H+(aq) → Cr 3+(aq) + Cl2(g) + ___ H2O(l).
A) 14
B) 5
C) 3
D) 7
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Answer Key
Testname: E2 REVIEW F06
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