Question 1

Which of the following is most soluble in water?

Accepted Answer

A)   benzene, C6H6
B)   potassium nitrate, KNO3
C)   carbon tetrachloride, CCl4
D)   hexane, C6H14
E)   ethane, C2H4F) All of the above
G) A) and C)

Question 2

Select the precipitate that forms when the following reactants are mixed. 
Mg(CH3COO) 2(aq)  + LiOH(aq)  

Accepted Answer

A)   LiCH3COO
B)   Li(CH3COO) 2
C)   MgOH
D)   Mg(OH) 2
E)   CH3OHF) All of the above
G) A) and D)

Question 3

In a redox reaction, the oxidizing agent undergoes loss of electrons.

Accepted Answer

A) True 
 B)False

Question 4

Select the precipitate that forms when the following reactants are mixed. Na2CO3(aq)  + BaCl2(aq)  

Accepted Answer

A)   Ba2CO3
B)   BaCO3
C)   NaCl
D)   NaCl2
E)   BaOF) A) and B)
G) A) and C)

Question 5

Which one of the following substances is the best electrolyte?

Accepted Answer

A)   CO
B)   CH3Cl
C)   CH4
D)   C2H5OH
E)   HClF) A) and E)
G) A) and D)

Question 6

In each of the following cases, write down the oxidation number of the indicated atom.
a. P in P4
b. C in C2H6
c. S in H2SO4
d. Mn in MnO4-
e. S in S4O62-
f. P in Na3PO4

Accepted Answer

a. 0
b. -3...

Question 7

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 ( 3 (   = 84.02 g/mol) ? HCl(aq)  + NaHCO3(s)   NaCl(s)  + H2O(l)  + CO2(g)  A)  638 mL B)  572 mL C)  536 mL D)  276 mL E)  175 mL" class="answers-bank-image d-inline" rel="preload" > = 84.02 g/mol) ? HCl(aq)  + NaHCO3(s)   NaCl(s)  + H2O(l)  + CO2(g)

Accepted Answer

A)   638 mL
B)   572 mL
C)   536 mL
D)   276 mL
E)   175 mLF) A) and B)
G) A) and C)

Question 8

Select the classification for the following reaction. 2Ag+(aq)  + Zn(s)   2Ag(s)  + Zn2+(aq)

Accepted Answer

A)   displacement
B)   decomposition
C)   combination
D)   precipitation
E)   acid-baseF) B) and C)
G) A) and B)

Question 9

Consider the reaction: 
3Co2+(aq)  + 6NO3-(aq)  + 6Na+(aq)  + 2PO43-(aq)   Co3(PO4) 2(s)  + 6Na+(aq)  + 6NO3-(aq) 
Identify the net ionic equation for this reaction.

Accepted Answer

A)   Na+(aq)  + NO3-(aq)   NaNO3(aq) 
B)   3Co2+(aq)  + NO3-(aq)  + Na+(aq)  + 2PO43-(aq)   Co3(PO4) 2(s)  + NaNO3(aq) 
C)   3Co2+(aq)  + 6NO3-(aq)  + 6Na+(aq)  + 2PO43-(aq)   Co3(PO4) 2(s)  + 6NaNO3(aq) 
D)   3Co2+(aq)  + 2PO43-(aq)   Co3(PO4) 2(s) 
E)   None of the above is the correct net ionic equation.F) All of the above
G) A) and C)

Question 10

Select the classification for the following reaction. 2H2O2(aq)   2H2O(l)  + O2(g)

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   none of the aboveF) All of the above
G) B) and E)

Question 11

How many moles of ions are released when 0.27 mol of cobalt(II)  chloride, CoCl2, is dissolved in water?

Accepted Answer

A)   0.81 mol
B)   0.54 mol
C)   0.27 mol
D)   0.18 mol
E)   0.090 molF) A) and E)
G) A) and D)

Question 12

Select the precipitate that forms when aqueous lead(II)  nitrate reacts with aqueous sodium sulfate.

Accepted Answer

A)   NaNO3
B)   Na2NO3
C)   PbSO4
D)   Pb2SO4
E)   PbSF) All of the above
G) A) and C)

Question 13

Select the net ionic equation for the reaction between sodium chloride and mercury(I)  nitrate. 2NaCl(aq)  + Hg2(NO3) 2(aq)   NaNO3(aq)  + Hg2Cl2(s)

Accepted Answer

A)   Na+(aq)  + NO3-(aq)   NaNO3(aq) 
B)   Hg22+(aq)  + 2Cl-(aq)   Hg2Cl2(s) 
C)   NaCl(aq)   Na+(aq)  + Cl-(aq) 
D)   Hg2(NO3) 2(aq)   Hg22+(aq)  + 2NO3-(aq) 
E)   Hg22+(aq)   Hg2(s) F) A) and D)
G) A) and B)

Question 14

Sulfuric acid (H2SO4) reacts with potassium hydroxide (KOH) as follows.
H2SO4(aq) + 2KOH(aq) F1F1F1S1F1F1F10 K2SO4(aq) + 2H2O(l)
Calculate the volume of 0.100 M sulfuric acid required to neutralize 25.0 mL of 0.0821 M KOH. Show all your work.

Accepted Answer

Question 15

The correct method for preparing one liter of a 1.0 M solution of X is to dissolve exactly one mole of X in exactly one liter of water.

Accepted Answer

A) True 
 B)False

Question 16

For each of the following species, write down, next to the formula, the oxidation number of the indicated atom.
a. P in H2PO2-
b. S in Na2S2O3
c. C in CH2O

Accepted Answer

Question 17

Select the classification for the following reaction. 2NaCl(l)  2(g)  A)  acid-base B)  precipitation C)  combination D)  displacement E)  decomposition" class="answers-bank-image d-inline" rel="preload" > 2Na(l)  + Cl2(g)

Accepted Answer

A)   acid-base
B)   precipitation
C)   combination
D)   displacement
E)   decompositionF) All of the above
G) C) and D)

Question 18

Which of the following is a weak base?

Accepted Answer

A)   NH3
B)   Ca(OH) 2
C)   Ba(OH) 2
D)   NaOH
E)   CH3COOHF) B) and D)
G) C) and D)

Question 19

An aqueous solution of lead nitrate, Pb(NO3)2, is mixed with one of sodium chromate, Na2CrO4, resulting in the formation of a precipitate of lead chromate. Write a balanced net ionic equation for this precipitation reaction, showing all phases.

Accepted Answer

Pb²⁺(aq) + C...

Question 20

Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

Accepted Answer

A)   CaCl2
B)   HNO3
C)   NH3
D)   C6H12O6 (glucose) 
E)   CO2F) B) and D)
G) C) and D)

Exam 4: The Major Classes of Chemical Reactions

Select the net ionic equation for the reaction between sodium chloride and mercury(I) nitrate. 2NaCl(aq) + Hg2(NO3) 2(aq)  NaNO3(aq) + Hg2Cl2(s)

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Which of the following is most soluble in water?

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The correct method for preparing one liter of a 1.0 M solution of X is to dissolve exactly one mole of X in exactly one liter of water.

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Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl2(g)

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Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

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Select the precipitate that forms when aqueous lead(II) nitrate reacts with aqueous sodium sulfate.

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Select the classification for the following reaction. 2H2O2(aq)  2H2O(l) + O2(g)

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An aqueous solution of lead nitrate, Pb(NO3)2, is mixed with one of sodium chromate, Na2CrO4, resulting in the formation of a precipitate of lead chromate. Write a balanced net ionic equation for this precipitation reaction, showing all phases.

Correct AnswerverifiedPb2+(aq) + C...View AnswerShow Answer

In a redox reaction, the oxidizing agent undergoes loss of electrons.

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How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 ( = 84.02 g/mol) ? HCl(aq) + NaHCO3(s)  NaCl(s) + H2O(l) + CO2(g)

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Select the precipitate that forms when the following reactants are mixed. Na2CO3(aq) + BaCl2(aq) 

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Which one of the following substances is the best electrolyte?

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Select the classification for the following reaction. 2Ag+(aq) + Zn(s)  2Ag(s) + Zn2+(aq)

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Consider the reaction: 3Co2+(aq) + 6NO3-(aq) + 6Na+(aq) + 2PO43-(aq)  Co3(PO4) 2(s) + 6Na+(aq) + 6NO3-(aq) Identify the net ionic equation for this reaction.

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Which of the following is a weak base?

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For each of the following species, write down, next to the formula, the oxidation number of the indicated atom. a. P in H2PO2- b. S in Na2S2O3 c. C in CH2O

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How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl2, is dissolved in water?

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In each of the following cases, write down the oxidation number of the indicated atom. a. P in P4 b. C in C2H6 c. S in H2SO4 d. Mn in MnO4- e. S in S4O62- f. P in Na3PO4

Correct Answerverifieda. 0b. -3...View AnswerShow Answer

Select the precipitate that forms when the following reactants are mixed. Mg(CH3COO) 2(aq) + LiOH(aq) 

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Sulfuric acid (H2SO4) reacts with potassium hydroxide (KOH) as follows. H2SO4(aq) + 2KOH(aq)  K2SO4(aq) + 2H2O(l) Calculate the volume of 0.100 M sulfuric acid required to neutralize 25.0 mL of 0.0821 M KOH. Show all your work.

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Select the net ionic equation for the reaction between sodium chloride and mercury(I) nitrate. 2NaCl(aq) + Hg₂(NO₃) ₂(aq)  NaNO₃(aq) + Hg₂Cl₂(s)

Correct Answer
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Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl₂(g)

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Select the classification for the following reaction. 2H₂O₂(aq)  2H₂O(l) + O₂(g)

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An aqueous solution of lead nitrate, Pb(NO₃)₂, is mixed with one of sodium chromate, Na₂CrO₄, resulting in the formation of a precipitate of lead chromate. Write a balanced net ionic equation for this precipitation reaction, showing all phases.

Correct Answer
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Pb²⁺(aq) + C...
View Answer

Correct Answer
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How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO₃( = 84.02 g/mol) ? HCl(aq) + NaHCO₃(s)  NaCl(s) + H₂O(l) + CO₂(g)

Correct Answer
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Select the precipitate that forms when the following reactants are mixed. Na₂CO₃(aq) + BaCl₂(aq) 

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Correct Answer
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Select the classification for the following reaction. 2Ag⁺(aq) + Zn(s)  2Ag(s) + Zn²⁺(aq)

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Consider the reaction: 3Co²⁺(aq) + 6NO₃^-(aq) + 6Na⁺(aq) + 2PO₄^3-(aq)  Co₃(PO₄) ₂(s) + 6Na⁺(aq) + 6NO₃^-(aq) Identify the net ionic equation for this reaction.

Correct Answer
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Correct Answer
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For each of the following species, write down, next to the formula, the oxidation number of the indicated atom. a. P in H₂PO₂^- b. S in Na₂S₂O₃ c. C in CH₂O

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How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl₂, is dissolved in water?

Correct Answer
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In each of the following cases, write down the oxidation number of the indicated atom. a. P in P₄ b. C in C₂H₆ c. S in H₂SO₄ d. Mn in MnO₄^- e. S in S₄O₆^2- f. P in Na₃PO₄

Correct Answer
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a. 0
b. -3...
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Select the precipitate that forms when the following reactants are mixed. Mg(CH₃COO) ₂(aq) + LiOH(aq) 

Correct Answer
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Sulfuric acid (H₂SO₄) reacts with potassium hydroxide (KOH) as follows. H₂SO₄(aq) + 2KOH(aq)  K₂SO₄(aq) + 2H₂O(l) Calculate the volume of 0.100 M sulfuric acid required to neutralize 25.0 mL of 0.0821 M KOH. Show all your work.

Correct Answer
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