Question 1

What is the oxidation number of each O in NH4(H2PO4)?

Accepted Answer

A)  -3 
B)  +1 
C)  -2 
D)  +5 
E)  0 
A)  -3 
B)  +1 
C)  -2 
D)  +5 
E)  0

Question 2

Which of the following are classified as precipitation reactions?
1)AgNO3(aq)+ HCl(aq)$\to$  AgCl(s)+ HNO3(aq)
2)2Mg(s)+ O2(g)$\to$  2MgO(s)
3)Zn(s)+ 2Ag+(aq)$\to$  2Ag(s)+ Zn2+(aq)

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  2 and 3 
E)  1,2,and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  2 and 3 
E)  1,2,and 3

Question 3

What are the spectator ions in the reaction between aqueous hydrochloric acid and aqueous potassium hydroxide?

Accepted Answer

A)  K+ only 
B)  H+ and OH- 
C)  K+ and Cl- 
D)  Cl- only 
E)  H+,Cl-,K+,and OH- 
A)  K+ only 
B)  H+ and OH- 
C)  K+ and Cl- 
D)  Cl- only 
E)  H+,Cl-,K+,and OH-

Question 4

Which of the following would $\underline{\text{  not }}$  be depicted as the individual ions on the reactant side of a complete ionic reaction?

Accepted Answer

A)  NaOH 
B)  HCl 
C)  Cd(NO3)2 
D)  CdCO3 
E)  CrCl3 
A)  NaOH 
B)  HCl 
C)  Cd(NO3)2 
D)  CdCO3 
E)  CrCl3

Question 5

Which of the following statements is/are CORRECT?
1)A solution is a homogeneous mixture of two or more substances.
2)A solute is a mixture of a solvent and a soluble compound.
3)Aqueous solutions are solutions in which water is a solvent.

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1 and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1 and 3

Question 6

Which anion will form a precipitate with Ca2+?

Accepted Answer

A)  Cl- 
B)  OH- 
C)  C2H3O2- 
D)  Br- 
E)  none 
A)  Cl- 
B)  OH- 
C)  C2H3O2- 
D)  Br- 
E)  none

Question 7

Which one of the following equations is properly balanced?

Accepted Answer

A)  Sn + 4HNO3 $\to$SnO2 + 4NO2 + 2H2O 
B)  2Na2SO4 + 3Bi(NO3)3 $\to$ Bi2(SO4)3 + 9NaNO3 
C)  CH3CHO + 3O2 $\to$ 2CO2 + 2H2O 
D)  NH4NO3 $\to$ 2H2O + N2 
E)  Na2CO3 + 2H2SO4 $\to$Na2SO4 + 2H2O + CO2 
A)  Sn + 4HNO3 $\to$SnO2 + 4NO2 + 2H2O 
B)  2Na2SO4 + 3Bi(NO3)3 $\to$ Bi2(SO4)3 + 9NaNO3 
C)  CH3CHO + 3O2 $\to$ 2CO2 + 2H2O 
D)  NH4NO3 $\to$ 2H2O + N2 
E)  Na2CO3 + 2H2SO4 $\to$Na2SO4 + 2H2O + CO2

Question 8

Which of the following compounds is $\underline{\text{ insoluble }}$  in water?

Accepted Answer

A)  NH4Br 
B)  KBr 
C)  ZnCl2 
D)  AgBr 
E)  NaBr 
A)  NH4Br 
B)  KBr 
C)  ZnCl2 
D)  AgBr 
E)  NaBr

Question 9

The net ionic equation for the reaction between aqueous ammonia and hydrochloric acid is

Accepted Answer

A)  HCl(aq)+ NH3(aq)$\to$ NH4Cl(aq). 
B)  H+(aq)+ OH-(aq)$\to$ H2O(   ). 
C)  HCl(aq)+ OH-(aq)$\to$ Cl-(aq)+ H2O(   ). 
D)  H+(aq)+ NH3(aq)$\to$  NH4+(aq). 
E)  H+(aq)+ Cl-(aq)+ NH3(aq)$\to$  NH4+(aq)+ Cl-(aq). 
A)  HCl(aq)+ NH3(aq)$\to$ NH4Cl(aq). 
B)  H+(aq)+ OH-(aq)$\to$ H2O(   ). 
C)  HCl(aq)+ OH-(aq)$\to$ Cl-(aq)+ H2O(   ). 
D)  H+(aq)+ NH3(aq)$\to$  NH4+(aq). 
E)  H+(aq)+ Cl-(aq)+ NH3(aq)$\to$  NH4+(aq)+ Cl-(aq).

Question 10

All of the following compounds are $\underline{\text{insoluble  }}$  in water except ____.

Accepted Answer

A)  BaCO3 
B)  PbF2 
C)  Fe(OH)3 
D)  Ni(ClO4)2 
E)  PbCrO4 
A)  BaCO3 
B)  PbF2 
C)  Fe(OH)3 
D)  Ni(ClO4)2 
E)  PbCrO4

Question 11

Which of the following is a $\underline{\text{ strong base  }}$ in aqueous solution?

Accepted Answer

A)  HOCH2CH2OH 
B)  Sr(OH)2 
C)  H3PO4 
D)  NH3 
E)  HI 
A)  HOCH2CH2OH 
B)  Sr(OH)2 
C)  H3PO4 
D)  NH3 
E)  HI

Question 12

The $\underline{\text{ net ionic equation  }}$ for the reaction of magnesium sulfite with nitric acid is

Accepted Answer

A)  MgSO3(s)+ 2H+(aq)$\to$ Mg2+(aq)+ SO2(g)+ H2O(   ). 
B)  Mg2+(aq)+ CO32-(aq)+ 2H+(aq)+ 2NO3-(aq)$\to$ Mg(NO3)2(aq)+ SO2(g)+ H2O(   ). 
C)  MgSO3(s)+ 2HNO2(aq)$\to$  Mg2+(aq)+ 2NO2-(aq)+ SO2(g)+ H2O(   ). 
D)  Mg(HSO3)2(s)+ 2HNO3(aq)$\to$ Mg2+(aq)+ 2NO3-(aq)+ SO2(g)+ 2H2O(   ). 
E)  MgSO3(s)+ 2HNO3(aq)$\to$ Mg2+(aq)+ 2NO3-(aq)+ SO2(g)+ H2O(   ). 
A)  MgSO3(s)+ 2H+(aq)$\to$ Mg2+(aq)+ SO2(g)+ H2O(   ). 
B)  Mg2+(aq)+ CO32-(aq)+ 2H+(aq)+ 2NO3-(aq)$\to$ Mg(NO3)2(aq)+ SO2(g)+ H2O(   ). 
C)  MgSO3(s)+ 2HNO2(aq)$\to$  Mg2+(aq)+ 2NO2-(aq)+ SO2(g)+ H2O(   ). 
D)  Mg(HSO3)2(s)+ 2HNO3(aq)$\to$ Mg2+(aq)+ 2NO3-(aq)+ SO2(g)+ 2H2O(   ). 
E)  MgSO3(s)+ 2HNO3(aq)$\to$ Mg2+(aq)+ 2NO3-(aq)+ SO2(g)+ H2O(   ).

Question 13

Which of the following elements generally acts as an oxidizing agent?

Accepted Answer

A)  Br2 
B)  H2 
C)  Fe 
D)  C 
E)  Li 
A)  Br2 
B)  H2 
C)  Fe 
D)  C 
E)  Li

Question 14

If an aqueous solution of ____ is added to a mixture of F- and SO42-,the fluoride ion will precipitate,but the sulfate ion will remain in solution.

Accepted Answer

A)  LiBr 
B)  HNO3 
C)  Pb(ClO4)2 
D)  MgNO3 
E)  AlCl3 
A)  LiBr 
B)  HNO3 
C)  Pb(ClO4)2 
D)  MgNO3 
E)  AlCl3

Question 15

Which of the following compounds is $\underline{\text{soluble  }}$ in water?

Accepted Answer

A)  Al2S3 
B)  K2O 
C)  CoS 
D)  Hg2I2 
E)  HgO 
A)  Al2S3 
B)  K2O 
C)  CoS 
D)  Hg2I2 
E)  HgO

Question 16

In the reaction of acetic acid with aqueous cesium hydroxide,what is the spectator ion?

Accepted Answer

A)  OH-(aq) 
B)  There is no spectator ion. 
C)  C2H3O2-(aq) 
D)  Cs+(aq) 
E)  H+(aq) 
A)  OH-(aq) 
B)  There is no spectator ion. 
C)  C2H3O2-(aq) 
D)  Cs+(aq) 
E)  H+(aq)

Question 17

In the following reaction,which species is oxidized?
3Rb2S(s)+ 8H+(aq)+ 2NO3-(aq)$\to$  6Rb+(aq)+ 3S(s)+ 2NO(g)+ 4H2O

Accepted Answer

A)  NO3- 
B)  Rb2S 
C)  Rb+ 
D)  NO 
E)  H+ 
A)  NO3- 
B)  Rb2S 
C)  Rb+ 
D)  NO 
E)  H+

Question 18

If an aqueous sodium hydroxide solution is left in contact with air,the concentration of hydroxide ion gradually decreases.The process can be hastened if a person exhales over a sodium hydroxide solution.Write a balanced chemical equation that describes the process by which the hydroxide ion concentration decreases.

Accepted Answer

OH<sup>-</sup>(aq)+

Question 19

Hydrocyanic acid,HCN,is a weak acid.Write a net ionic equation for the reaction of aqueous hydrocyanic acid and aqueous sodium hydroxide.

Accepted Answer

A)  HCN(aq)+ NaOH(aq)$\to$ Na+(aq)+ CN-(aq)+ H2O(   ) 
B)  HCN(aq)+ H2O(aq)$\to$ CN-(aq)+ H3O+(aq) 
C)  H+(aq)+ OH-(aq)$\to$ H2O(   ) 
D)  HCN(aq)+ OH-(aq)$\to$ CN-(aq)+ H2O(   ) 
E)  H+(aq)+ NaOH(aq)$\to$ Na+(aq)+ H2O(   ) 
A)  HCN(aq)+ NaOH(aq)$\to$ Na+(aq)+ CN-(aq)+ H2O(   ) 
B)  HCN(aq)+ H2O(aq)$\to$ CN-(aq)+ H3O+(aq) 
C)  H+(aq)+ OH-(aq)$\to$ H2O(   ) 
D)  HCN(aq)+ OH-(aq)$\to$ CN-(aq)+ H2O(   ) 
E)  H+(aq)+ NaOH(aq)$\to$ Na+(aq)+ H2O(   )

Question 20

Which of the following equations is $\underline{\text{ not  }}$ balanced?

Accepted Answer

A)  2Sb2OS2 + 10O2 $\to$2Sb2O5 + 4SO3 
B)  (NH4)2Cr2O7 $\to$N2 + 4H2O + Cr2O3 
C)  C12H22O11 + 12O2 $\to$ 12CO2 + 11H2O 
D)  2NaCl + Pb(NO3)2 $\to$ PbCl2 + 2NaNO3 
E)  Fe3O4 + 3CO $\to$ 3Fe + 3CO2 
A)  2Sb2OS2 + 10O2 $\to$2Sb2O5 + 4SO3 
B)  (NH4)2Cr2O7 $\to$N2 + 4H2O + Cr2O3 
C)  C12H22O11 + 12O2 $\to$ 12CO2 + 11H2O 
D)  2NaCl + Pb(NO3)2 $\to$ PbCl2 + 2NaNO3 
E)  Fe3O4 + 3CO $\to$ 3Fe + 3CO2

Exam 4: Chemical Reactions

What is the oxidation number of each O in NH4(H2PO4)?

Which of the following are classified as precipitation reactions? 1)AgNO3(aq)+ HCl(aq) →\to→ AgCl(s)+ HNO3(aq) 2)2Mg(s)+ O2(g) →\to→ 2MgO(s) 3)Zn(s)+ 2Ag+(aq) →\to→ 2Ag(s)+ Zn2+(aq)

What are the spectator ions in the reaction between aqueous hydrochloric acid and aqueous potassium hydroxide?

Which of the following would not ‾\underline{\text{ not }} not ​ be depicted as the individual ions on the reactant side of a complete ionic reaction?

Which of the following statements is/are CORRECT? 1)A solution is a homogeneous mixture of two or more substances. 2)A solute is a mixture of a solvent and a soluble compound. 3)Aqueous solutions are solutions in which water is a solvent.

Which anion will form a precipitate with Ca2+?

Which one of the following equations is properly balanced?

Which of the following compounds is insoluble ‾\underline{\text{ insoluble }} insoluble ​ in water?

The net ionic equation for the reaction between aqueous ammonia and hydrochloric acid is

All of the following compounds are insoluble ‾\underline{\text{insoluble }}insoluble ​ in water except ____.

Which of the following is a strong base ‾\underline{\text{ strong base }} strong base ​ in aqueous solution?

The net ionic equation ‾\underline{\text{ net ionic equation }} net ionic equation ​ for the reaction of magnesium sulfite with nitric acid is

Which of the following elements generally acts as an oxidizing agent?

If an aqueous solution of ____ is added to a mixture of F- and SO42-,the fluoride ion will precipitate,but the sulfate ion will remain in solution.

Which of the following compounds is soluble ‾\underline{\text{soluble }}soluble ​ in water?

In the reaction of acetic acid with aqueous cesium hydroxide,what is the spectator ion?

In the following reaction,which species is oxidized? 3Rb2S(s)+ 8H+(aq)+ 2NO3-(aq) →\to→ 6Rb+(aq)+ 3S(s)+ 2NO(g)+ 4H2O

Hydrocyanic acid,HCN,is a weak acid.Write a net ionic equation for the reaction of aqueous hydrocyanic acid and aqueous sodium hydroxide.

Which of the following equations is not ‾\underline{\text{ not }} not ​ balanced?

Basic Concepts of Chemistry

Mathlets Review: The Tools of Quantitative Chemistry

Atoms, molecules, and Ions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure: Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Chemistry of Solids

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Reactivity: Chemical Equilibria

The Chemistry of Acids and Bases

Principles of Reactivity: Other Aspects of Aqueous Equilibria

Entropy and Free Energy

Principles of Reactivity: Electron Transfer Reactions

Environmental Chemistry Earths Environment,energy,and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

What is the oxidation number of each O in NH₄(H₂PO₄)?

Which of the following are classified as precipitation reactions? 1)AgNO₃(aq)+ HCl(aq) $\to$ AgCl(s)+ HNO₃(aq) 2)2Mg(s)+ O₂(g) $\to$ 2MgO(s) 3)Zn(s)+ 2Ag⁺(aq) $\to$ 2Ag(s)+ Zn²⁺(aq)

Which of the following would $\underline{\text{ not }}$ be depicted as the individual ions on the reactant side of a complete ionic reaction?

Which anion will form a precipitate with Ca²⁺?

Which of the following compounds is $\underline{\text{ insoluble }}$ in water?

All of the following compounds are $\underline{\text{insoluble }}$ in water except ____.

Which of the following is a $\underline{\text{ strong base }}$ in aqueous solution?

The $\underline{\text{ net ionic equation }}$ for the reaction of magnesium sulfite with nitric acid is

If an aqueous solution of ____ is added to a mixture of F^- and SO₄^2-,the fluoride ion will precipitate,but the sulfate ion will remain in solution.

Which of the following compounds is $\underline{\text{soluble }}$ in water?

In the following reaction,which species is oxidized? 3Rb₂S(s)+ 8H⁺(aq)+ 2NO₃^-(aq) $\to$ 6Rb⁺(aq)+ 3S(s)+ 2NO(g)+ 4H₂O

Which of the following equations is $\underline{\text{ not }}$ balanced?