Question 1

The oxidation number of Cr in Cr2O72-  is

Accepted Answer

A) -12. 
B) -7. 
C) -2. 
D) +6. 
E) +7. 
A) -12. 
B) -7. 
C) -2. 
D) +6. 
E) +7.

Question 2

The highest possible oxidation number of nitrogen is

Accepted Answer

A) +8. 
B) +5. 
C) +3. 
D) +1. 
E) -3. 
A) +8. 
B) +5. 
C) +3. 
D) +1. 
E) -3.

Question 3

The oxidation number of N in NaNO3 is

Accepted Answer

A) +6. 
B) +5. 
C) +3. 
D) -3. 
E) None of the above. 
A) +6. 
B) +5. 
C) +3. 
D) -3. 
E) None of the above.

Question 4

Select the compound in which sulfur has its highest possible oxidation number.

Accepted Answer

A) H2S 
B) SO2 
C) SCl2 
D) H2SO3 
E) Na2SO4 
A) H2S 
B) SO2 
C) SCl2 
D) H2SO3 
E) Na2SO4

Question 5

A piece of copper metal was added to an aqueous solution of silver nitrate, and within a few minutes it was observed that a grey crystalline solid formed on surface of the copper and the solution turned a blue color characteristic of copper(II)ions.
Write the balanced chemical equation for this reaction.

Accepted Answer

Cu(s)+ 2AgNO_3</

Question 6

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 7

Identify the following compounds as a strong electrolytes, weak electrolytes, or nonelectrolytes: KNO3, KNO2, HNO3, HNO2,

Accepted Answer

KNO₃, KNO₂, and HNO₃ ar

Question 8

Which of the following compounds is a weak electrolyte?

Accepted Answer

A) HCl 
B) CH3COOH (acetic acid) 
C) C6H12O6 (glucose) 
D) O2 
E) NaCl 
A) HCl 
B) CH3COOH (acetic acid) 
C) C6H12O6 (glucose) 
D) O2 
E) NaCl

Question 9

Batteries in our cars generate electricity by the following chemical reaction.
Pb + PbO2 + 2H2SO4 $\rarr$ 2PbSO4 + 2H2O
What is the reducing agent in this process?

Accepted Answer

The answer of Batteries in our cars generate electricity by...

Question 10

Describe the procedure used to make 3.0 liters of a 2.0 M KCl solution, starting with solid KCl and water.

Accepted Answer

Determine the molar mass of KC

Question 11

Which of the following compounds is a weak electrolyte?

Accepted Answer

A) HNO3 
B) NaNO3 
C) HNO2 
D) NaNO2 
E) NaOH 
A) HNO3 
B) NaNO3 
C) HNO2 
D) NaNO2 
E) NaOH

Question 12

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 13

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 balanced chemical equation for this reaction.

Accepted Answer

Zn(s)+ Pb(NO_3</

Question 14

Most compounds containing chlorides, bromides, and iodides are soluble except those containing Ag+, Hg22+, and Pb2+.

Accepted Answer

A) True 
 B)False

Question 15

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 16

What is the molarity of a solution that contains 5.0 moles of solute in 2.00 liters of solution?

Accepted Answer

The answer of What is the molarity of a solution...

Question 17

What is the chemical formula of the salt produced by the neutralization of potassium hydroxide with sulfuric acid?

Accepted Answer

A) KSO3 
B) K2(SO4)3 
C) K2SO4 
D) K(SO4)2 
E) KSO4 
A) KSO3 
B) K2(SO4)3 
C) K2SO4 
D) K(SO4)2 
E) KSO4

Question 18

Identify the oxidizing agent in the following reaction.
4Al + 3O2 $\rarr$2Al2O3

Accepted Answer

The answer of Identify the oxidizing agent in the following...

Question 19

Calcium nitrate tetrahydrate dissolves in cold water to the extent of 266 g per 100. cm3. What is the concentration of nitrate ions in this solution?

Accepted Answer

A) 32.4M 
B) 22.5M 
C) 11.3M 
D) 16.2M 
E) 8.10M 
A) 32.4M 
B) 22.5M 
C) 11.3M 
D) 16.2M 
E) 8.10M

Question 20

What is the chemical formula of the salt produced by the neutralization of hydrobromic acid with magnesium hydroxide?

Accepted Answer

A) MgBr 
B) Mg2Br3 
C) Mg3Br2 
D) Mg2Br 
E) MgBr2 
A) MgBr 
B) Mg2Br3 
C) Mg3Br2 
D) Mg2Br 
E) MgBr2

Exam 4: Reactions in Aqueous Solution

The oxidation number of Cr in Cr2O72- is

The highest possible oxidation number of nitrogen is

The oxidation number of N in NaNO3 is

Select the compound in which sulfur has its highest possible oxidation number.

Which of the following compounds is a strong electrolyte?

Identify the following compounds as a strong electrolytes, weak electrolytes, or nonelectrolytes: KNO3, KNO2, HNO3, HNO2,

Which of the following compounds is a weak electrolyte?

Batteries in our cars generate electricity by the following chemical reaction. Pb + PbO2 + 2H2SO4 →\rarr→ 2PbSO4 + 2H2O What is the reducing agent in this process?

Describe the procedure used to make 3.0 liters of a 2.0 M KCl solution, starting with solid KCl and water.

Which of the following compounds is a weak electrolyte?

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

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 balanced chemical equation for this reaction.

Most compounds containing chlorides, bromides, and iodides are soluble except those containing Ag+, Hg22+, and Pb2+.

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

What is the molarity of a solution that contains 5.0 moles of solute in 2.00 liters of solution?

What is the chemical formula of the salt produced by the neutralization of potassium hydroxide with sulfuric acid?

Identify the oxidizing agent in the following reaction. 4Al + 3O2 →\rarr→ 2Al2O3

Calcium nitrate tetrahydrate dissolves in cold water to the extent of 266 g per 100. cm3. What is the concentration of nitrate ions in this solution?

What is the chemical formula of the salt produced by the neutralization of hydrobromic acid with magnesium hydroxide?

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

The oxidation number of Cr in Cr₂O₇^2- is

The oxidation number of N in NaNO₃ is

Identify the following compounds as a strong electrolytes, weak electrolytes, or nonelectrolytes: KNO₃, KNO₂, HNO₃, HNO₂,

Batteries in our cars generate electricity by the following chemical reaction. Pb + PbO₂ + 2H₂SO₄ $\rarr$ 2PbSO₄ + 2H₂O What is the reducing agent in this process?

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

Most compounds containing chlorides, bromides, and iodides are soluble except those containing Ag⁺, Hg₂²⁺, and Pb²⁺.

Identify the oxidizing agent in the following reaction. 4Al + 3O₂ $\rarr$ 2Al₂O₃

Calcium nitrate tetrahydrate dissolves in cold water to the extent of 266 g per 100. cm³. What is the concentration of nitrate ions in this solution?