Question 1

Which of the following aqueous solutions is probably the poorest electrical conductor?

Accepted Answer

A) 0.5 M K2SO4  
B) 0.5 M CaCl2  
C) 0.5 M HF 
D) 0.5 M CH3OH 
E) 0.5 M NH3  
A) 0.5 M K2SO4  
B) 0.5 M CaCl2  
C) 0.5 M HF 
D) 0.5 M CH3OH 
E) 0.5 M NH3

Question 2

What is the proper coefficient for water when the following equation is completed and balanced for the reaction in basic solution?
C2O42- (aq)+ MnO4- (aq)→ CO32- (aq)+ MnO2(s)

Accepted Answer

A) 4 
B) 3 
C) 2 
D) 1 
E) 0 
A) 4 
B) 3 
C) 2 
D) 1 
E) 0

Question 3

Balance the following equation in basic solution:
Cr3+ + O22- → CrO42- 
The sum of the coefficients is ________.

Accepted Answer

A) 13 
B) 53 
C) 27 
D) 18 
E) 38 
A) 13 
B) 53 
C) 27 
D) 18 
E) 38

Question 4

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution:
CuS(s)+ HNO3(aq)→ Cu(NO3)2(aq)+ H2O(l)+ NO(g)+ S(s)
The sum of the coefficients is ________.

Accepted Answer

A) 23 
B) 18 
C) 35 
D) 33 
E) 45 
A) 23 
B) 18 
C) 35 
D) 33 
E) 45

Question 5

Which of the following pairs react to give both a precipitation and a neutralization reaction?

Accepted Answer

A) Ca(OH)2(aq)and H2SO4(aq) 
B) Mg(OH)2(aq)and H2SO4(aq) 
C) Sr(OH)2(aq)and HNO3(aq) 
D) Ba(OH)2(aq)and HNO3(aq) 
A) Ca(OH)2(aq)and H2SO4(aq) 
B) Mg(OH)2(aq)and H2SO4(aq) 
C) Sr(OH)2(aq)and HNO3(aq) 
D) Ba(OH)2(aq)and HNO3(aq)

Question 6

Which of the following is most likely to be a strong oxidizing agent?

Accepted Answer

A) MnO 
B) MnO2 
C) KMnO4 
D) Mn2O3 
E) Mn3O4 
A) MnO 
B) MnO2 
C) KMnO4 
D) Mn2O3 
E) Mn3O4

Question 7

Balance the following oxidation-reduction reaction in acid solution:
MnO4-(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)+ H2O(l)
The sum of the coefficients is ________.

Accepted Answer

A) 25 
B) 47 
C) 33 
D) 18 
E) 21 
A) 25 
B) 47 
C) 33 
D) 18 
E) 21

Question 8

A solution of potassium permanganate was standardized by titration of a solution prepared by dissolving 0.268 g of pure sodium oxalate in approximately 25 mL of distilled water.A 31.4 mL volume of titrant was required to reach the end-point.The reaction is:
2 MnO4- + 5 C2O42- + 16 H+ → 2 Mn2+ + 10 CO2 + 8 H2O
What is the molarity of MnO4-?

Accepted Answer

A) 0.0174 M 
B) 0.0255 M 
C) 0.0348 M 
D) 0.0637 M 
E) 0.159 M 
A) 0.0174 M 
B) 0.0255 M 
C) 0.0348 M 
D) 0.0637 M 
E) 0.159 M

Question 9

To precipitate Ba2+(aq)from solution,one could add:

Accepted Answer

A) HCl(aq) 
B) (NH4)2CO3(aq)in NH3(aq) 
C) H2S(aq)in NH3/NH4+(aq) 
D) H2S(aq)in 0.3 M HCl(aq) 
E) NaCl(aq) 
A) HCl(aq) 
B) (NH4)2CO3(aq)in NH3(aq) 
C) H2S(aq)in NH3/NH4+(aq) 
D) H2S(aq)in 0.3 M HCl(aq) 
E) NaCl(aq)

Question 10

Write the net ionic equation for the reaction of lead(II)nitrate and sodium iodide.

Accepted Answer

A) Pb(NO3)2(aq)+ 2 NaI(aq)→ PbI2(s)+ 2 NaNO3(aq) 
B) Pb2+(aq)+ 2 NaI(aq)→ PbI2(s)+ 2 Na 
C) Pb2+(aq)+ 2 I-(aq)→ PbI2(s) 
D) Pb2+(aq)+ 2 I-(aq)→ Pb2+(aq)+ 2 I-(aq) 
E) no reaction 
A) Pb(NO3)2(aq)+ 2 NaI(aq)→ PbI2(s)+ 2 NaNO3(aq) 
B) Pb2+(aq)+ 2 NaI(aq)→ PbI2(s)+ 2 Na 
C) Pb2+(aq)+ 2 I-(aq)→ PbI2(s) 
D) Pb2+(aq)+ 2 I-(aq)→ Pb2+(aq)+ 2 I-(aq) 
E) no reaction

Question 11

A solution is 0.20 M Ba(OH)2(aq).How many moles of HCl(aq)must be added to neutralize 100.0 mL of the solution?

Accepted Answer

A) 0.020 mol 
B) 0.080 mol 
C) 0.040 mol 
D) 0.40 mol 
E) 0.80 mol 
A) 0.020 mol 
B) 0.080 mol 
C) 0.040 mol 
D) 0.40 mol 
E) 0.80 mol

Question 12

Aqueous solutions of HBr ,HI ,HNO3,NaBr ,and KNO3 are all classified as:

Accepted Answer

A) acids 
B) nonelectrolytes 
C) strong electrolytes 
D) weak electrolytes 
A) acids 
B) nonelectrolytes 
C) strong electrolytes 
D) weak electrolytes

Question 13

The substance NaOH in water solution is a:

Accepted Answer

A) nonelectrolyte 
B) weak electrolyte 
C) weak base 
D) strong electrolyte 
E) weak acid 
A) nonelectrolyte 
B) weak electrolyte 
C) weak base 
D) strong electrolyte 
E) weak acid

Question 14

Which of the following compounds is an Arrhenius base?

Accepted Answer

A) C6H12O6 
B) HOCl 
C) H2SO4 
D) C6H5NH2 
A) C6H12O6 
B) HOCl 
C) H2SO4 
D) C6H5NH2

Question 15

The hydrated proton attracts only one water molecule.

Accepted Answer

A) True 
 B)False

Question 16

In which of the following pairs is the oxidation number for the underlined element INCORRECT?

Accepted Answer

A) BrO4-/(+7) 
B) CO32-/(+4) 
C) FeO/ (+2) 
D) IO3-/(+5 ) 
E) Mg(OH)2/(+3 ) 
A) BrO4-/(+7) 
B) CO32-/(+4) 
C) FeO/ (+2) 
D) IO3-/(+5 ) 
E) Mg(OH)2/(+3 )

Question 17

A 5.00 mL sample of a nitric acid solution is titrated with 33.5 mL of 0.201 M NaOH.What is the molarity of the nitric acid solution?

Accepted Answer

A) 0.0300 M 
B) 0.149 M 
C) 1.35 M 
D) 6.7 M 
E) 0.522 M 
A) 0.0300 M 
B) 0.149 M 
C) 1.35 M 
D) 6.7 M 
E) 0.522 M

Question 18

Which of the following aqueous solutions has the lowest concentration of sulfate ion?

Accepted Answer

A) 0.1 M Al2(SO4)3  
B) 0.2 M MgSO4  
C) 0.3 M Li2SO4  
D) 0.4 M K2SO4  
E) 0.5 M CuSO4  
A) 0.1 M Al2(SO4)3  
B) 0.2 M MgSO4  
C) 0.3 M Li2SO4  
D) 0.4 M K2SO4  
E) 0.5 M CuSO4

Question 19

Complete the equation and indicate if a precipitate forms.
Na+(aq)+ OH-(aq)+ Mg2+(aq)+ Cl-(aq)→

Accepted Answer

A) NaCl(s)+ Mg2+(aq)+ 2 OH-(aq)  
B) Mg(OH)2(s)+ Na+(aq)+ Cl-(aq)  
C) MgCl2(s)+ Na+(aq)+ OH-(aq)  
D) MgCl2(s)+ NaOH(s) 
E) no reaction 
A) NaCl(s)+ Mg2+(aq)+ 2 OH-(aq)  
B) Mg(OH)2(s)+ Na+(aq)+ Cl-(aq)  
C) MgCl2(s)+ Na+(aq)+ OH-(aq)  
D) MgCl2(s)+ NaOH(s) 
E) no reaction

Question 20

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution:
ClO4-(aq)+ SO32-(aq)→ SO42-(aq)+ Cl-(aq)
The sum of the coefficients is ________.

Accepted Answer

A) 8 
B) 12 
C) 10 
D) 4 
E) 6 
A) 8 
B) 12 
C) 10 
D) 4 
E) 6

Exam 5: Introduction to Reactions in Aqueous Solutions

Which of the following aqueous solutions is probably the poorest electrical conductor?

What is the proper coefficient for water when the following equation is completed and balanced for the reaction in basic solution? C2O42- (aq)+ MnO4- (aq)→ CO32- (aq)+ MnO2(s)

Balance the following equation in basic solution: Cr3+ + O22- → CrO42- The sum of the coefficients is ________.

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: CuS(s)+ HNO3(aq)→ Cu(NO3)2(aq)+ H2O(l)+ NO(g)+ S(s) The sum of the coefficients is ________.

Which of the following pairs react to give both a precipitation and a neutralization reaction?

Which of the following is most likely to be a strong oxidizing agent?

Balance the following oxidation-reduction reaction in acid solution: MnO4-(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)+ H2O(l) The sum of the coefficients is ________.

To precipitate Ba2+(aq)from solution,one could add:

Write the net ionic equation for the reaction of lead(II)nitrate and sodium iodide.

A solution is 0.20 M Ba(OH)2(aq).How many moles of HCl(aq)must be added to neutralize 100.0 mL of the solution?

Aqueous solutions of HBr ,HI ,HNO3,NaBr ,and KNO3 are all classified as:

The substance NaOH in water solution is a:

Which of the following compounds is an Arrhenius base?

The hydrated proton attracts only one water molecule.

In which of the following pairs is the oxidation number for the underlined element INCORRECT?

A 5.00 mL sample of a nitric acid solution is titrated with 33.5 mL of 0.201 M NaOH.What is the molarity of the nitric acid solution?

Which of the following aqueous solutions has the lowest concentration of sulfate ion?

Complete the equation and indicate if a precipitate forms. Na+(aq)+ OH-(aq)+ Mg2+(aq)+ Cl-(aq)→

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: ClO4-(aq)+ SO32-(aq)→ SO42-(aq)+ Cl-(aq) The sum of the coefficients is ________.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

What is the proper coefficient for water when the following equation is completed and balanced for the reaction in basic solution? C₂O₄^2-(aq)+ MnO₄^-(aq)→ CO₃^2-(aq)+ MnO₂(s)

Balance the following equation in basic solution: Cr³⁺ + O₂^2- → CrO₄^2- The sum of the coefficients is ________.

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: CuS(s)+ HNO₃(aq)→ Cu(NO₃)₂(aq)+ H₂O(l)+ NO(g)+ S(s) The sum of the coefficients is ________.

Balance the following oxidation-reduction reaction in acid solution: MnO₄^-(aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)+ H₂O(l) The sum of the coefficients is ________.

To precipitate Ba²⁺(aq)from solution,one could add:

A solution is 0.20 M Ba(OH)₂(aq).How many moles of HCl(aq)must be added to neutralize 100.0 mL of the solution?

Aqueous solutions of HBr,HI,HNO₃,NaBr,and KNO₃ are all classified as:

Complete the equation and indicate if a precipitate forms. Na⁺(aq)+ OH^-(aq)+ Mg²⁺(aq)+ Cl^-(aq)→

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: ClO₄^-(aq)+ SO₃^2-(aq)→ SO₄^2-(aq)+ Cl^-(aq) The sum of the coefficients is ________.