Question 1

What is the reduction half reaction for the following chemical reaction in a basic solution?
ClO-(aq)+ Cr(OH)4-(aq)→ CrO42-(aq)+ Cl-(aq)

Accepted Answer

A) ClO-(aq)+ 2 H+(aq)+ 2e- → Cl-(aq)+ H2O(l) 
B) ClO-(aq)+ H2O(l)+ 2e- → Cl-(aq)+ 2 OH-(aq) 
C) Cr(OH)4-(aq)+ 4 OH-(aq)→ CrO42-(aq)+ 4 H2O(l)+ 3e- 
D) Cr(OH)4-(aq)→ CrO42-(aq)+ 4 H+(aq)+ 3e- 
A) ClO-(aq)+ 2 H+(aq)+ 2e- → Cl-(aq)+ H2O(l) 
B) ClO-(aq)+ H2O(l)+ 2e- → Cl-(aq)+ 2 OH-(aq) 
C) Cr(OH)4-(aq)+ 4 OH-(aq)→ CrO42-(aq)+ 4 H2O(l)+ 3e- 
D) Cr(OH)4-(aq)→ CrO42-(aq)+ 4 H+(aq)+ 3e-

Question 2

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 3

What is the oxidation number of the oxygen atom in H2O2?

Accepted Answer

A) -2 
B) -1 
C) +1 
D) +2 
A) -2 
B) -1 
C) +1 
D) +2

Question 4

What are the coefficients in front of Fe(s)and O3(g)when the following equation is balanced in a basic solution?
_____ Fe(s)+ _____ O3(g)→ _____ Fe2O3(s)+ _____ O2(g)

Accepted Answer

A) 2,2 
B) 2,3 
C) 3,2 
D) 3,4 
A) 2,2 
B) 2,3 
C) 3,2 
D) 3,4

Question 5

Assume that an aqueous solution of hydroxide ion,OHS1U1P1-S1S1P0,represented by unshaded spheres,is allowed to mix with a solution of an acid,HS1U1B1nS1U1B0A,represented by gray spheres.Three possible outcomes are represented by boxes (a)-(c),where the black spheres represent AS1U1P1nS1S1P0S1U1P1-S1S1P0,the anion of the acid.For clarity HS1U1B12S1U1B0O molecules are not shown.  
-Which outcome corresponds to the reaction:
H3AsO4 + 3 OH- → 3 H2O + AsO43-?

Accepted Answer

A) box (a) 
B) box (b) 
C) box (c) 
D) None of these 
A) box (a) 
B) box (b) 
C) box (c) 
D) None of these

Question 6

Which species functions as the oxidizing agent in the following reduction-oxidation reaction?
5 Fe2+(aq)+ MnO4-(aq)+ 8 H+(aq)→ Mn2+(aq)+ 5 Fe3+(aq)+ 4 H2O(l)

Accepted Answer

A) Fe2+(aq) 
B) H+(aq) 
C) Mn2+(aq) 
D) MnO4-(aq) 
A) Fe2+(aq) 
B) H+(aq) 
C) Mn2+(aq) 
D) MnO4-(aq)

Question 7

According to the balanced equation shown below,1.00 mole of oxalic acid,H2C2O4,reacts with ________ moles of permanganate ion,MnO4-.
5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+(aq)→ 10 CO2(g)+ 2 Mn2+(aq)+ 8 H2O(l)

Accepted Answer

A) 0)400 
B) 1)00 
C) 2)00 
D) 2)25 
A) 0)400 
B) 1)00 
C) 2)00 
D) 2)25

Question 8

Based on the balanced chemical equation shown below,determine the molarity of a solution containing Fe2+(aq),if 40.00 mL of the Fe2+(aq)solution is required to completely react with 30.00 mL of a 0.250 M potassium bromate,KBrO3(aq),solution.The chemical equation for the reaction is:
6 Fe2+(aq)+ BrO3-(aq)+ 6 H+(aq)→ 6 Fe3+(aq)+ Br-(aq)+ 3 H2O(l).

Accepted Answer

A) 0)0312 M 
B) 0)188 M 
C) 1)12 M 
D) 2)00 M 
A) 0)0312 M 
B) 0)188 M 
C) 1)12 M 
D) 2)00 M

Question 9

In the reaction 2 MnO4-(aq)+ 10 Br-(aq)+ 16 H+(aq)→ 2 Mn2+(aq)+5 Br2(aq)+ 8 H2O(aq)the reducing agent is ________.

Accepted Answer

Question 10

-Which of the above graphs corresponds to titration III?

Accepted Answer

A) graph (1) 
B) graph (2) 
C) graph (3) 
D) None of the graphs 
A) graph (1) 
B) graph (2) 
C) graph (3) 
D) None of the graphs

Question 11

Which of the following is not a strong acid?

Accepted Answer

A) HF 
B) HCl 
C) HBr 
D) HI 
A) HF 
B) HCl 
C) HBr 
D) HI

Question 12

Acetic acid (CH3CO2H),formic acid (HCO2H),hydrofluoric acid (HF),ammonia (NH3),and methylamine (CH3NH2)are commonly 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

Three different substances,A2X,A2Y,and A2Z,were dissolved in water with the following results.(Water molecules are omitted for clarity. )Which of the substances is the strongest electrolyte,and which is the weakest?

Accepted Answer

A) A2X is the strongest electrolyte and A2Y is the weakest electrolyte. 
B) A2Y is the strongest electrolyte and A2X is the weakest electrolyte. 
C) A2Y is the strongest electrolyte and A2Z is the weakest electrolyte. 
D) A2Z is the strongest electrolyte and A2Y is the weakest electrolyte. 
A) A2X is the strongest electrolyte and A2Y is the weakest electrolyte. 
B) A2Y is the strongest electrolyte and A2X is the weakest electrolyte. 
C) A2Y is the strongest electrolyte and A2Z is the weakest electrolyte. 
D) A2Z is the strongest electrolyte and A2Y is the weakest electrolyte.

Question 14

Which species functions as the reducing agent in the following reduction-oxidation reaction?
2 P(s)+ 3 Br2(l)→ 2 PBr3(l)

Accepted Answer

A) Br-(aq) 
B) Br2(l) 
C) P(s) 
D) P3+(aq) 
A) Br-(aq) 
B) Br2(l) 
C) P(s) 
D) P3+(aq)

Question 15

When dissolved in water,of HClO4, Ca(OH)2,KOH,HI,which are acids?

Accepted Answer

A) Ca(OH)2 and KOH 
B) HClO4 and HI 
C) only HI 
D) only KOH 
A) Ca(OH)2 and KOH 
B) HClO4 and HI 
C) only HI 
D) only KOH

Question 16

Redox reactions occurring in acid are evident by the appearance of ________ in the balanced equation,and redox reactions occurring in base are evident by the appearance of ________ in the balanced equation.

Accepted Answer

The answer of Redox reactions occurring in acid are evident...

Question 17

Water (H2O),methyl alcohol (CH3OH),ethyl alcohol (CH3CH2OH),ethylene glycol (HOCH2CH2OH),and sucrose (C12H22O11)are commonly classified as

Accepted Answer

A) bases. 
B) nonelectrolytes. 
C) strong electrolytes. 
D) weak electrolytes. 
A) bases. 
B) nonelectrolytes. 
C) strong electrolytes. 
D) weak electrolytes.

Question 18

Predict the products of a reaction between Ba(NO3)2(aq)and K2SO4(aq).

Accepted Answer

A) Ba(s),KNO3(aq)and K2SO3(aq) 
B) BaSO3(s)and KNO2(aq) 
C) BaSO3(s)and KNO3(aq) 
D) BaSO4(s)and KNO3(aq) 
A) Ba(s),KNO3(aq)and K2SO3(aq) 
B) BaSO3(s)and KNO2(aq) 
C) BaSO3(s)and KNO3(aq) 
D) BaSO4(s)and KNO3(aq)

Question 19

Based on the balanced chemical equation shown below,determine the mass percent of Fe3+ in a 0.7450 g sample of iron ore,if 22.40 mL of a 0.1000 M stannous chloride,SnCl2(aq),solution is required to completely react with the Fe3+ present in the ore sample.The chemical equation for the reaction is:
2 Fe3+(aq)+ Sn2+(aq)→ 2 Fe2+(aq)+ Sn4+(aq).

Accepted Answer

A) 5)365% 
B) 8)396% 
C) 16.79% 
D) 33.58% 
A) 5)365% 
B) 8)396% 
C) 16.79% 
D) 33.58%

Question 20

Write a balanced net ionic equation for the reaction of CdCl2(aq)with Na2S(aq).

Accepted Answer

A) CdCl2(aq)+ Na2S(aq)→ CdS (aq)+ 2 NaCl(aq) 
B) Cd2+(aq)+ 2 Cl-(aq)+ 2 Na+(aq)+ S2-(aq)→ CdS(s)+ 2 NaCl(aq) 
C) Cd2+(aq)+ S2-(aq)→ CdS(s) 
D) Cd2+(aq)+ 2 Cl-(aq)+ 2 Na+(aq)+ S2-(aq)→ CdS(s)+ 2 Na+(aq) 
A) CdCl2(aq)+ Na2S(aq)→ CdS (aq)+ 2 NaCl(aq) 
B) Cd2+(aq)+ 2 Cl-(aq)+ 2 Na+(aq)+ S2-(aq)→ CdS(s)+ 2 NaCl(aq) 
C) Cd2+(aq)+ S2-(aq)→ CdS(s) 
D) Cd2+(aq)+ 2 Cl-(aq)+ 2 Na+(aq)+ S2-(aq)→ CdS(s)+ 2 Na+(aq)

What is the reduction half reaction for the following chemical reaction in a basic solution? ClO^-(aq)+ Cr(OH)₄^-(aq)→ CrO₄^2-(aq)+ Cl^-(aq)

Which of the following compounds is an Arrhenius base?

What is the oxidation number of the oxygen atom in H₂O₂?

What are the coefficients in front of Fe(s)and O₃(g)when the following equation is balanced in a basic solution? ___ Fe(s)+ _ O₃(g)→ _ Fe₂O₃(s)+ ___ O₂(g)

Which species functions as the oxidizing agent in the following reduction-oxidation reaction? 5 Fe²⁺(aq)+ MnO₄^-(aq)+ 8 H⁺(aq)→ Mn²⁺(aq)+ 5 Fe³⁺(aq)+ 4 H₂O(l)

According to the balanced equation shown below,1.00 mole of oxalic acid,H₂C₂O₄,reacts with ________ moles of permanganate ion,MnO₄^-. 5 H₂C₂O₄(aq)+ 2 MnO₄^-(aq)+ 6 H⁺(aq)→ 10 CO₂(g)+ 2 Mn²⁺(aq)+ 8 H₂O(l)

In the reaction 2 MnO₄^-(aq)+ 10 Br^-(aq)+ 16 H⁺(aq)→ 2 Mn²⁺^(aq)+5 Br₂(aq)+ 8 H₂O(aq)the reducing agent is ________.

-Which of the above graphs corresponds to titration III?

Which of the following is not a strong acid?

Acetic acid (CH₃CO₂H),formic acid (HCO₂H),hydrofluoric acid (HF),ammonia (NH₃),and methylamine (CH₃NH₂)are commonly classified as

Three different substances,A₂X,A₂Y,and A₂Z,were dissolved in water with the following results.(Water molecules are omitted for clarity. )Which of the substances is the strongest electrolyte,and which is the weakest?

Which species functions as the reducing agent in the following reduction-oxidation reaction? 2 P(s)+ 3 Br₂(l)→ 2 PBr₃(l)

When dissolved in water,of HClO_4, Ca(OH)₂,KOH,HI,which are acids?

Redox reactions occurring in acid are evident by the appearance of in the balanced equation,and redox reactions occurring in base are evident by the appearance of in the balanced equation.

Water (H₂O),methyl alcohol (CH₃OH),ethyl alcohol (CH₃CH₂OH),ethylene glycol (HOCH₂CH₂OH),and sucrose (C₁₂H₂₂O₁₁)are commonly classified as

Predict the products of a reaction between Ba(NO₃)₂(aq)and K₂SO₄(aq).

Write a balanced net ionic equation for the reaction of CdCl₂(aq)with Na₂S(aq).

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

Exam 4: Reactions in Aqueous Solutions

What is the reduction half reaction for the following chemical reaction in a basic solution? ClO-(aq)+ Cr(OH)4-(aq)→ CrO42-(aq)+ Cl-(aq)

Which of the following compounds is an Arrhenius base?

What is the oxidation number of the oxygen atom in H2O2?

What are the coefficients in front of Fe(s)and O3(g)when the following equation is balanced in a basic solution? _____ Fe(s)+ _____ O3(g)→ _____ Fe2O3(s)+ _____ O2(g)

Which species functions as the oxidizing agent in the following reduction-oxidation reaction? 5 Fe2+(aq)+ MnO4-(aq)+ 8 H+(aq)→ Mn2+(aq)+ 5 Fe3+(aq)+ 4 H2O(l)

According to the balanced equation shown below,1.00 mole of oxalic acid,H2C2O4,reacts with ________ moles of permanganate ion,MnO4-. 5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+(aq)→ 10 CO2(g)+ 2 Mn2+(aq)+ 8 H2O(l)

In the reaction 2 MnO4-(aq)+ 10 Br-(aq)+ 16 H+(aq)→ 2 Mn2+(aq)+5 Br2(aq)+ 8 H2O(aq)the reducing agent is ________.

-Which of the above graphs corresponds to titration III?

Which of the following is not a strong acid?

Acetic acid (CH3CO2H),formic acid (HCO2H),hydrofluoric acid (HF),ammonia (NH3),and methylamine (CH3NH2)are commonly classified as

Three different substances,A2X,A2Y,and A2Z,were dissolved in water with the following results.(Water molecules are omitted for clarity. )Which of the substances is the strongest electrolyte,and which is the weakest?

Which species functions as the reducing agent in the following reduction-oxidation reaction? 2 P(s)+ 3 Br2(l)→ 2 PBr3(l)

When dissolved in water,of HClO4, Ca(OH)2,KOH,HI,which are acids?

Redox reactions occurring in acid are evident by the appearance of ________ in the balanced equation,and redox reactions occurring in base are evident by the appearance of ________ in the balanced equation.

Water (H2O),methyl alcohol (CH3OH),ethyl alcohol (CH3CH2OH),ethylene glycol (HOCH2CH2OH),and sucrose (C12H22O11)are commonly classified as

Predict the products of a reaction between Ba(NO3)2(aq)and K2SO4(aq).

Write a balanced net ionic equation for the reaction of CdCl2(aq)with Na2S(aq).

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

What is the reduction half reaction for the following chemical reaction in a basic solution? ClO^-(aq)+ Cr(OH)₄^-(aq)→ CrO₄^2-(aq)+ Cl^-(aq)

What is the oxidation number of the oxygen atom in H₂O₂?

What are the coefficients in front of Fe(s)and O₃(g)when the following equation is balanced in a basic solution? ___ Fe(s)+ _ O₃(g)→ _ Fe₂O₃(s)+ ___ O₂(g)

Which species functions as the oxidizing agent in the following reduction-oxidation reaction? 5 Fe²⁺(aq)+ MnO₄^-(aq)+ 8 H⁺(aq)→ Mn²⁺(aq)+ 5 Fe³⁺(aq)+ 4 H₂O(l)

According to the balanced equation shown below,1.00 mole of oxalic acid,H₂C₂O₄,reacts with ________ moles of permanganate ion,MnO₄^-. 5 H₂C₂O₄(aq)+ 2 MnO₄^-(aq)+ 6 H⁺(aq)→ 10 CO₂(g)+ 2 Mn²⁺(aq)+ 8 H₂O(l)

In the reaction 2 MnO₄^-(aq)+ 10 Br^-(aq)+ 16 H⁺(aq)→ 2 Mn²⁺^(aq)+5 Br₂(aq)+ 8 H₂O(aq)the reducing agent is ________.

Acetic acid (CH₃CO₂H),formic acid (HCO₂H),hydrofluoric acid (HF),ammonia (NH₃),and methylamine (CH₃NH₂)are commonly classified as

Three different substances,A₂X,A₂Y,and A₂Z,were dissolved in water with the following results.(Water molecules are omitted for clarity. )Which of the substances is the strongest electrolyte,and which is the weakest?

Which species functions as the reducing agent in the following reduction-oxidation reaction? 2 P(s)+ 3 Br₂(l)→ 2 PBr₃(l)

When dissolved in water,of HClO_4, Ca(OH)₂,KOH,HI,which are acids?

Redox reactions occurring in acid are evident by the appearance of in the balanced equation,and redox reactions occurring in base are evident by the appearance of in the balanced equation.

Water (H₂O),methyl alcohol (CH₃OH),ethyl alcohol (CH₃CH₂OH),ethylene glycol (HOCH₂CH₂OH),and sucrose (C₁₂H₂₂O₁₁)are commonly classified as

Predict the products of a reaction between Ba(NO₃)₂(aq)and K₂SO₄(aq).

Write a balanced net ionic equation for the reaction of CdCl₂(aq)with Na₂S(aq).