Question 1

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)  PbS 
A)  NaNO3 
B)  Na2NO3 
C)  PbSO4 
D)  Pb2SO4 
E)  PbS

Question 2

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq) + Na2CO3(aq) $\rightarrow$

Accepted Answer

A)  copper(I) carbonate, Cu2CO3 
B)  copper(II) carbonate, Cu2CO3 
C)  copper(I) carbonate, CuCO3 
D)  copper(II) carbonate, CuCO3 
E)  sodium chloride, NaCl 
A)  copper(I) carbonate, Cu2CO3 
B)  copper(II) carbonate, Cu2CO3 
C)  copper(I) carbonate, CuCO3 
D)  copper(II) carbonate, CuCO3 
E)  sodium chloride, NaCl

Question 3

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

Question 4

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4)3PO4, is dissolved in water?

Accepted Answer

A)  0.40 mol 
B)  1.6 mol 
C)  3.2 mol 
D)  4.8 mol 
E)  6.4 mol 
A)  0.40 mol 
B)  1.6 mol 
C)  3.2 mol 
D)  4.8 mol 
E)  6.4 mol

Question 5

Select the classification for the following reaction: Fe2+(aq) + 2OH¯(aq) $\rightarrow$Fe(OH)2(s)

Accepted Answer

A)  precipitation 
B)  acid-base 
C)  redox 
D)  decomposition 
E)  None of these choices is correct. 
A)  precipitation 
B)  acid-base 
C)  redox 
D)  decomposition 
E)  None of these choices is correct.

Question 6

Select the correct set of products for the following reaction. Ba(OH)2(aq) + HNO3(aq) $\rightarrow$

Accepted Answer

A)  BaN2(s) + H2O(l) 
B)  Ba(NO3)2(aq) + H2O(l) 
C)  Ba(s) + H2(g) + NO2(g) 
D)  Ba2O(s) + NO2(g) + H2O(l) 
E)  No reaction occurs. 
A)  BaN2(s) + H2O(l) 
B)  Ba(NO3)2(aq) + H2O(l) 
C)  Ba(s) + H2(g) + NO2(g) 
D)  Ba2O(s) + NO2(g) + H2O(l) 
E)  No reaction occurs.

Question 7

What is the oxidation number of iodine in I2.

Accepted Answer

A)  -1 
B)  0 
C)  +1 
D)  +7 
E)  None of these choices is correct. 
A)  -1 
B)  0 
C)  +1 
D)  +7 
E)  None of these choices is correct.

Question 8

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

Accepted Answer

A)  Na+(aq) + NO3¯(aq) $\rightarrow$NaNO3(aq) 
B)  3Co2+(aq) + NO3¯(aq) + Na+(aq) + 2PO43¯(aq) $\rightarrow$Co3(PO4)2(s) + NaNO3(aq) 
C)  3Co2+(aq) + 6NO3¯(aq) + 6Na+(aq) + 2PO43¯(aq) $\rightarrow$Co3(PO4)2(s) + 6NaNO3(aq) 
D)  3Co2+(aq) + 2PO43¯(aq) $\rightarrow$Co3(PO4)2(s) 
E)  None of these choices is correct. 
A)  Na+(aq) + NO3¯(aq) $\rightarrow$NaNO3(aq) 
B)  3Co2+(aq) + NO3¯(aq) + Na+(aq) + 2PO43¯(aq) $\rightarrow$Co3(PO4)2(s) + NaNO3(aq) 
C)  3Co2+(aq) + 6NO3¯(aq) + 6Na+(aq) + 2PO43¯(aq) $\rightarrow$Co3(PO4)2(s) + 6NaNO3(aq) 
D)  3Co2+(aq) + 2PO43¯(aq) $\rightarrow$Co3(PO4)2(s) 
E)  None of these choices is correct.

Question 9

Which of the following is a strong base?

Accepted Answer

A)  NH3 
B)  Ca(OH)2 
C)  Al(OH)3 
D)  B(OH)3 
E)  CH3OH 
A)  NH3 
B)  Ca(OH)2 
C)  Al(OH)3 
D)  B(OH)3 
E)  CH3OH

Question 10

Which one of the following ionic compounds is insoluble in water?

Accepted Answer

A)  Na3PO4 
B)  AgNO3 
C)  NaCl 
D)  CaCO3 
E)  MgCl2 
A)  Na3PO4 
B)  AgNO3 
C)  NaCl 
D)  CaCO3 
E)  MgCl2

Question 11

Select the classification for the following reaction: NH3(aq) + HNO3(aq) $\rightarrow$NH4NO3(aq)

Accepted Answer

A)  precipitation 
B)  acid-base 
C)  redox 
D)  decomposition 
E)  None of these choices is correct. 
A)  precipitation 
B)  acid-base 
C)  redox 
D)  decomposition 
E)  None of these choices is correct.

Question 12

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, C2H4 
A)  benzene, C6H6 
B)  potassium nitrate, KNO3 
C)  carbon tetrachloride, CCl4 
D)  hexane, C6H14 
E)  ethane, C2H4

Question 13

Predict the product(s) for the following reaction:

Accepted Answer

A)  K2SO4(aq) + H2O(l) 
B)  K2S(aq) + H2O(l) 
C)  K(s) + H2(g) + SO3(g) 
D)  KSO4(aq) + H2O(l) 
E)  No reaction occurs. 
A)  K2SO4(aq) + H2O(l) 
B)  K2S(aq) + H2O(l) 
C)  K(s) + H2(g) + SO3(g) 
D)  KSO4(aq) + H2O(l) 
E)  No reaction occurs.

Question 14

The combustion of an element is always a combination reaction.

Accepted Answer

A) True 
 B)False

Question 15

Chemical reactions generally reach equilibrium because one of the reactants is used up.

Accepted Answer

A) True 
 B)False

Question 16

In an acid-base (neutralization) reaction the equivalence point is the point where the indicator changes color.

Accepted Answer

A) True 
 B)False

Question 17

Select the classification for the following reaction.

Accepted Answer

A)  combination 
B)  displacement 
C)  decomposition 
D)  precipitation 
E)  acid-base 
A)  combination 
B)  displacement 
C)  decomposition 
D)  precipitation 
E)  acid-base

Question 18

Which one of the following substances is a strong acid?

Accepted Answer

A)  HNO3 
B)  H2CO3 
C)  NH3 
D)  CH3COOH 
E)  H3PO4 
A)  HNO3 
B)  H2CO3 
C)  NH3 
D)  CH3COOH 
E)  H3PO4

Question 19

How many moles of H+(aq) ions are present in 750 mL of 0.65 M hydrochloric acid?

Accepted Answer

A)  1.2 mol 
B)  0.98 mol 
C)  0.87 mol 
D)  0.65 mol 
E)  0.49 mol 
A)  1.2 mol 
B)  0.98 mol 
C)  0.87 mol 
D)  0.65 mol 
E)  0.49 mol

Question 20

Which of the following will be least soluble in water?

Accepted Answer

A)  potassium sulfate, K2SO4 
B)  ammonium nitrate, NH4NO3 
C)  chloromethane, CH3Cl 
D)  calcium chloride, CaCl2 
E)  ethanol, C2H6O 
A)  potassium sulfate, K2SO4 
B)  ammonium nitrate, NH4NO3 
C)  chloromethane, CH3Cl 
D)  calcium chloride, CaCl2 
E)  ethanol, C2H6O

Exam 4: Three Major Classes of Chemical Reactions

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

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq) + Na2CO3(aq) →\rightarrow→

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

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4)3PO4, is dissolved in water?

Select the classification for the following reaction: Fe2+(aq) + 2OH¯(aq) →\rightarrow→ Fe(OH)2(s)

Select the correct set of products for the following reaction. Ba(OH)2(aq) + HNO3(aq) →\rightarrow→

What is the oxidation number of iodine in I2.

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

Which of the following is a strong base?

Which one of the following ionic compounds is insoluble in water?

Select the classification for the following reaction: NH3(aq) + HNO3(aq) →\rightarrow→ NH4NO3(aq)

Which of the following is most soluble in water?

Predict the product(s) for the following reaction:

The combustion of an element is always a combination reaction.

Chemical reactions generally reach equilibrium because one of the reactants is used up.

In an acid-base (neutralization) reaction the equivalence point is the point where the indicator changes color.

Select the classification for the following reaction.

Which one of the following substances is a strong acid?

How many moles of H+(aq) ions are present in 750 mL of 0.65 M hydrochloric acid?

Which of the following will be least soluble in water?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl₂(aq) + Na₂CO₃(aq) $\rightarrow$

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

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH₄)₃PO₄, is dissolved in water?

Select the classification for the following reaction: Fe²⁺(aq) + 2OH^¯(aq) $\rightarrow$ Fe(OH)₂(s)

Select the correct set of products for the following reaction. Ba(OH)₂(aq) + HNO₃(aq) $\rightarrow$

What is the oxidation number of iodine in I₂.

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

Select the classification for the following reaction: NH₃(aq) + HNO₃(aq) $\rightarrow$ NH₄NO₃(aq)

How many moles of H⁺(aq) ions are present in 750 mL of 0.65 M hydrochloric acid?