Question 1

Which of the following compounds is a weak electrolyte?

Accepted Answer

A) HCl 
B) NH3 
C) C6H12O6 (glucose) 
D) N2 
E) KCl 
A) HCl 
B) NH3 
C) C6H12O6 (glucose) 
D) N2 
E) KCl

Question 2

What element is reduced in the following chemical reaction? Cu + 2H2SO4 $\rarr$ CuSO4 + SO2 + 2H2O

Accepted Answer

A) Cu 
B) H 
C) S 
D) O 
E) H2O 
A) Cu 
B) H 
C) S 
D) O 
E) H2O

Question 3

Which of the following represents a halogen displacement reaction?

Accepted Answer

A) 2KBr(aq)+ Cl2(g)$\rarr$2KCl(aq)+ Br2(l) 
B) 2Na(s)+ 2H2O(l)$\rarr$2NaOH(aq)+ H2(g) 
C) CaBr2(aq)+ H2SO4(aq)$\rarr$ CaSO4(s)+ 2HBr(g) 
D) 2KNO3(s)$\rarr$ 2KNO2(s)+ O2(g) 
E) 2LiOH(aq)+ H2SO4(aq) $\rarr$Li2SO4(aq)+ 2H2O(l) 
A) 2KBr(aq)+ Cl2(g)$\rarr$2KCl(aq)+ Br2(l) 
B) 2Na(s)+ 2H2O(l)$\rarr$2NaOH(aq)+ H2(g) 
C) CaBr2(aq)+ H2SO4(aq)$\rarr$ CaSO4(s)+ 2HBr(g) 
D) 2KNO3(s)$\rarr$ 2KNO2(s)+ O2(g) 
E) 2LiOH(aq)+ H2SO4(aq) $\rarr$Li2SO4(aq)+ 2H2O(l)

Question 4

A piece of zinc metal was added to an aqueous solution of lead(II)nitrate.After some time it was observed that the zinc metal had appeared to fall apart and a solid had accumulated at the bottom of the reaction vessel.
Write the net ionic equation for this reaction.

Accepted Answer

Zn(s)+ Pb²⁺(

Question 5

Identify the oxidizing agent in the following chemical reaction. 2MnO4- + 5H2SO3 $\rarr$ 2Mn2+ + 5SO42- + 4H+ + 3H2O

Accepted Answer

A) MnO4- 
B) H2SO3 
C) Mn2+ 
D) SO42- 
E) H+ 
A) MnO4- 
B) H2SO3 
C) Mn2+ 
D) SO42- 
E) H+

Question 6

The common constituent in all acid solutions is

Accepted Answer

A) H2 
B) H+ 
C) OH- 
D) H2SO4 
E) Cl- 
A) H2 
B) H+ 
C) OH- 
D) H2SO4 
E) Cl-

Question 7

Identify the following compound as an electrolyte or nonelectrolyte: NaOH.

Accepted Answer

The answer of Identify the following compound as an electrolyte...

Question 8

The oxidation number of iodine increases by 6 in the following reaction.
2MnO4- + I- + H2O $\rarr$ 2MnO2 + IO3- + 2OH-

Accepted Answer

A) True 
 B)False

Question 9

Determine the oxidation number of each of the elements in Cs2Cr2O7?

Accepted Answer

the oxidation number

Question 10

Which of the following compounds is a strong electrolyte?

Accepted Answer

A) H2O 
B) CH3OH 
C) CH3CH2OH 
D) HF 
E) NaF 
A) H2O 
B) CH3OH 
C) CH3CH2OH 
D) HF 
E) NaF

Question 11

A 50.0 mL sample of 0.436 M NH4NO3 is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?

Accepted Answer

A) 21.8 M 
B) 0.459 M 
C) 2.18 * 10-2 M 
D) 8.72* 10-2 M 
E) 0.109 M 
A) 21.8 M 
B) 0.459 M 
C) 2.18 * 10-2 M 
D) 8.72* 10-2 M 
E) 0.109 M

Question 12

Identify the major ionic species present in an aqueous solution of H2SO4.

Accepted Answer

A) S6+, O36- (plus H2O as a neutral species) 
B) H+, OH-, S6+, 3O2- 
C) 2H+, S6+, 4O2- 
D) H+, HSO4- 
E) 2H+, SO42- 
A) S6+, O36- (plus H2O as a neutral species) 
B) H+, OH-, S6+, 3O2- 
C) 2H+, S6+, 4O2- 
D) H+, HSO4- 
E) 2H+, SO42-

Question 13

What is the molar concentration of chloride ions in a solution prepared by mixing 100.mL of 2.0 M KCl with 50.mL of a 1.5 M CaCl2 solution?

Accepted Answer

Question 14

Write balanced molecular and net ionic equations for the acid-base neutralization reaction between H3PO4(aq)and Ba(OH)2(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Accepted Answer

Molecular equation: 2H₃PO₄(aq)+

Question 15

Which of the following represents a hydrogen displacement reaction?

Accepted Answer

A) 2C2H6(g)+ 7O2(g)$\rarr$ 4CO2(g)+ 6H2O(l) 
B) 2KBr(aq)+ Cl2(g)$\rarr$2KCl(aq)+ Br2(l) 
C) N2(g)+ 3H2(g)$\rarr$2NH3(g) 
D) CaBr2(aq)+ H2SO4(aq)$\rarr$ CaSO4(s)+ 2HBr(g) 
E) 2Al(s)+ 3H2SO4(aq)$\rarr$Al2(SO4)3(aq)+ 3H2(g) 
A) 2C2H6(g)+ 7O2(g)$\rarr$ 4CO2(g)+ 6H2O(l) 
B) 2KBr(aq)+ Cl2(g)$\rarr$2KCl(aq)+ Br2(l) 
C) N2(g)+ 3H2(g)$\rarr$2NH3(g) 
D) CaBr2(aq)+ H2SO4(aq)$\rarr$ CaSO4(s)+ 2HBr(g) 
E) 2Al(s)+ 3H2SO4(aq)$\rarr$Al2(SO4)3(aq)+ 3H2(g)

Question 16

Which of the following equations does not represent an oxidation-reduction reaction?

Accepted Answer

A) 3Al + 6HCl $\rarr$3H2 + AlCl3 
B) 2H2O $\rarr$2H2 + O2 
C) 2NaCl + Pb(NO3)2 $\rarr$PbCl2 + 3NaNO3 
D) 2NaI + Br2 $\rarr$ 2NaBr + I2 
E) Cu(NO3)2 + Zn $\rarr$Zn(NO3)2 + Cu 
A) 3Al + 6HCl $\rarr$3H2 + AlCl3 
B) 2H2O $\rarr$2H2 + O2 
C) 2NaCl + Pb(NO3)2 $\rarr$PbCl2 + 3NaNO3 
D) 2NaI + Br2 $\rarr$ 2NaBr + I2 
E) Cu(NO3)2 + Zn $\rarr$Zn(NO3)2 + Cu

Question 17

A 0.9182 g sample of CaBr2 is dissolved in enough water to give 500.mL of solution.What is the calcium ion concentration in this solution?

Accepted Answer

A) 9.19 * 10-3 M 
B) 2.30 * 10-3 M 
C) 2.72 * 10-3 M 
D) 4.59 * 10-3 M 
E) 1.25 * 10-3 M 
A) 9.19 * 10-3 M 
B) 2.30 * 10-3 M 
C) 2.72 * 10-3 M 
D) 4.59 * 10-3 M 
E) 1.25 * 10-3 M

Question 18

Identify the following compound as a strong electrolyte, weak electrolyte, or nonelectrolyte: NH4Cl.

Accepted Answer

Question 19

Based on the solubility rules, which one of the following should be soluble in water?

Accepted Answer

A) (NH4)3PO4 
B) Ca3(PO4)2 
C) AlPO4 
D) Ag3PO4 
E) Mg3(PO4)2 
A) (NH4)3PO4 
B) Ca3(PO4)2 
C) AlPO4 
D) Ag3PO4 
E) Mg3(PO4)2

Question 20

Based on the solubility rules, which of the following will occur when a solution containing about 0.1 g of Pb(NO3)2(aq)is mixed with a solution containing 0.1 g of KI(aq)/100 mL?

Accepted Answer

A) KNO3 will precipitate; Pb2+ and I- are spectator ions. 
B) No precipitate will form. 
C) Pb(NO3)2 will precipitate; K+ and I- are spectator ions. 
D) PbI2 will precipitate; K+ and NO3- are spectator ions. 
E) Pb2+ and I- are spectator ions, and PbI2 will precipitate. 
A) KNO3 will precipitate; Pb2+ and I- are spectator ions. 
B) No precipitate will form. 
C) Pb(NO3)2 will precipitate; K+ and I- are spectator ions. 
D) PbI2 will precipitate; K+ and NO3- are spectator ions. 
E) Pb2+ and I- are spectator ions, and PbI2 will precipitate.

Exam 4: Reactions in Aqueous Solution

Which of the following compounds is a weak electrolyte?

What element is reduced in the following chemical reaction? Cu + 2H2SO4 →\rarr→ CuSO4 + SO2 + 2H2O

Which of the following represents a halogen displacement reaction?

A piece of zinc metal was added to an aqueous solution of lead(II)nitrate.After some time it was observed that the zinc metal had appeared to fall apart and a solid had accumulated at the bottom of the reaction vessel. Write the net ionic equation for this reaction.

Identify the oxidizing agent in the following chemical reaction. 2MnO4- + 5H2SO3 →\rarr→ 2Mn2+ + 5SO42- + 4H+ + 3H2O

The common constituent in all acid solutions is

Identify the following compound as an electrolyte or nonelectrolyte: NaOH.

The oxidation number of iodine increases by 6 in the following reaction. 2MnO4- + I- + H2O →\rarr→ 2MnO2 + IO3- + 2OH-

Determine the oxidation number of each of the elements in Cs2Cr2O7?

Which of the following compounds is a strong electrolyte?

A 50.0 mL sample of 0.436 M NH4NO3 is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?

Identify the major ionic species present in an aqueous solution of H2SO4.

What is the molar concentration of chloride ions in a solution prepared by mixing 100.mL of 2.0 M KCl with 50.mL of a 1.5 M CaCl2 solution?

Write balanced molecular and net ionic equations for the acid-base neutralization reaction between H3PO4(aq)and Ba(OH)2(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Which of the following represents a hydrogen displacement reaction?

Which of the following equations does not represent an oxidation-reduction reaction?

A 0.9182 g sample of CaBr2 is dissolved in enough water to give 500.mL of solution.What is the calcium ion concentration in this solution?

Identify the following compound as a strong electrolyte, weak electrolyte, or nonelectrolyte: NH4Cl.

Based on the solubility rules, which one of the following should be soluble in water?

Based on the solubility rules, which of the following will occur when a solution containing about 0.1 g of Pb(NO3)2(aq)is mixed with a solution containing 0.1 g of KI(aq)/100 mL?

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

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Filters

What element is reduced in the following chemical reaction? Cu + 2H₂SO₄ $\rarr$ CuSO₄ + SO₂ + 2H₂O

Identify the oxidizing agent in the following chemical reaction. 2MnO₄^- + 5H₂SO₃ $\rarr$ 2Mn²⁺ + 5SO₄^2- + 4H⁺ + 3H₂O

The oxidation number of iodine increases by 6 in the following reaction. 2MnO₄^- + I^- + H₂O $\rarr$ 2MnO₂ + IO₃^- + 2OH^-

Determine the oxidation number of each of the elements in Cs₂Cr₂O₇?

A 50.0 mL sample of 0.436 M NH₄NO₃ is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?

Identify the major ionic species present in an aqueous solution of H₂SO₄.

What is the molar concentration of chloride ions in a solution prepared by mixing 100.mL of 2.0 M KCl with 50.mL of a 1.5 M CaCl₂ solution?

Write balanced molecular and net ionic equations for the acid-base neutralization reaction between H₃PO₄(aq)and Ba(OH)₂(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

A 0.9182 g sample of CaBr₂ is dissolved in enough water to give 500.mL of solution.What is the calcium ion concentration in this solution?

Identify the following compound as a strong electrolyte, weak electrolyte, or nonelectrolyte: NH₄Cl.

Based on the solubility rules, which of the following will occur when a solution containing about 0.1 g of Pb(NO₃)₂(aq)is mixed with a solution containing 0.1 g of KI(aq)/100 mL?