Question 1

The following equation is an example of a net ionic equation.
Na+(aq)+ Br-(aq)+ Ag+(aq)+ NO3-(aq)$\rarr$ AgBr(s)+ Na+(aq)+ NO3-(aq)

Accepted Answer

A) True 
 B)False  False

Question 2

The oxidation number of N in N2H4 is

Accepted Answer

A) +4 
B) -4 
C) +2 
D) -2 
E) 0 
A) +4 
B) -4 
C) +2 
D) -2 
E) 0 D

Question 3

What is the correct formula of the salt formed in the neutralization reaction of hydrochloric acid with calcium hydroxide?

Accepted Answer

A) CaO 
B) CaCl2 
C) CaH2 
D) CaCl 
E) CaClH 
A) CaO 
B) CaCl2 
C) CaH2 
D) CaCl 
E) CaClH B

Question 4

Write balanced molecular and net ionic equations for the reaction that would occur between Al(s)and Co(NO3)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: 2Al(s)+ 3C

Question 5

Write a balanced molecular equation for the reaction that occurs when aqueous solutions of potassium iodide and lead(II)nitrate are combined.

Accepted Answer

2KI(aq)+ P

Question 6

Which of the following compounds is a strong electrolyte?

Accepted Answer

A) H2O 
B) N2 
C) CH3COOH (acetic acid) 
D) CH3CH2OH (ethanol) 
E) KOH 
A) H2O 
B) N2 
C) CH3COOH (acetic acid) 
D) CH3CH2OH (ethanol) 
E) KOH

Question 7

A 250.mL sample of 0.0328M HCl is partially neutralized by the addition of 100.mL of 0.0245M NaOH. Find the concentration of hydrochloric acid in the resulting solution.

Accepted Answer

A) 0.00700 M 
B) 0.0164 M 
C) 0.0383 M 
D) 0.0230 M 
E) 0.0575 M 
A) 0.00700 M 
B) 0.0164 M 
C) 0.0383 M 
D) 0.0230 M 
E) 0.0575 M

Question 8

The following reaction is a redox reaction.
CaC2(s)+ H2O(l)$\rarr$ HCCH(g)+ CaO(s)

Accepted Answer

A) True 
 B)False

Question 9

A 20.00 mL sample of 0.1015 M nitric acid is introduced into a flask, and water is added until the volume of the solution reaches 250.mL. What is the concentration of nitric acid in the final solution?

Accepted Answer

A) 1.27 M 
B) 8.12 * 10-3 M 
C) 0.406 M 
D) 3.25 * 10-2 M 
E) 5.08 * 10-4 M 
A) 1.27 M 
B) 8.12 * 10-3 M 
C) 0.406 M 
D) 3.25 * 10-2 M 
E) 5.08 * 10-4 M

Question 10

Write balanced molecular and net ionic equations for the reaction that would occur between CaCl2(aq)and Na2CO3(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Accepted Answer

Molecular equation: CaCl₂(aq)+

Question 11

Identify the element being oxidized in the following reaction.
4Al + 3O2 $\rarr$2Al2O3

Accepted Answer

Question 12

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 13

When solid iron(II)hydroxide is added to water, the resulting solution contains 1.4*10-3g of dissolved iron(II)hydroxide per liter of solution. What is the hydroxide ion concentration in this solution?

Accepted Answer

A) 7.8*10-6 M 
B) 1.6*10-5 M 
C) 2.5*10-10 M 
D) 3.1*10-5 M 
E) 4.0*10-3 M 
A) 7.8*10-6 M 
B) 1.6*10-5 M 
C) 2.5*10-10 M 
D) 3.1*10-5 M 
E) 4.0*10-3 M

Question 14

Calcium sulfate dihydrate (commonly known as gypsum)dissolves in cold water to the extent of 0.241 g per 100.cm3. What is the concentration of calcium ions in this solution?

Accepted Answer

A) 1.77*10-2 M 
B) 2.80*10-2 M 
C) 1.77*10-3 M 
D) 3.54*10-2 M 
E) 1,40*10-2 M 
A) 1.77*10-2 M 
B) 2.80*10-2 M 
C) 1.77*10-3 M 
D) 3.54*10-2 M 
E) 1,40*10-2 M

Question 15

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

Accepted Answer

Question 16

The highest possible oxidation number of carbon is

Accepted Answer

A) +8 
B) +6 
C) +4 
D) +2 
E) -4 
A) +8 
B) +6 
C) +4 
D) +2 
E) -4

Question 17

The following experiments were carried out and observations recorded.
Expt.#1: copper metal was added to an aqueous solution of silver nitrate
Observation: The copper become coated with a substance.
Expt.#2: lead metal was added to an aqueous solution of copper(II)nitrate
Observation: The lead turned black and crumbled.
Expt.#3: zinc metal was added to an aqueous solution of lead(II)nitrate
Observation: The zinc appeared to fall apart.
Rank the metals from most active to least active.

Accepted Answer

most active Zn, next

Question 18

Identify the elements that are oxidized and reduced in the following reaction. KClO3(aq)+ 6HBr(aq)$\rarr$ KCl(aq)+ 3Br2(l)+ 3H2O(l)

Accepted Answer

A) Br is oxidized and Cl is reduced 
B) Cl is oxidized and H is reduced 
C) H is oxidized and O is reduced 
D) O is oxidized and Cl is reduced 
E) Cl is oxidized and Br is reduced 
A) Br is oxidized and Cl is reduced 
B) Cl is oxidized and H is reduced 
C) H is oxidized and O is reduced 
D) O is oxidized and Cl is reduced 
E) Cl is oxidized and Br is reduced

Question 19

Write the net ionic equation for the following reaction.Aqueous iron(III)sulfate is added to aqueous sodium sulfide to produce solid iron(III)sulfide and aqueous sodium sulfate.

Accepted Answer

2Fe³⁺(aq)+ 3

Question 20

Define solution, solute, and solvent.

Accepted Answer

A solution is a homogeneous mi

Exam 4: Reactions in Aqueous Solution

The following equation is an example of a net ionic equation. Na+(aq)+ Br-(aq)+ Ag+(aq)+ NO3-(aq) →\rarr→ AgBr(s)+ Na+(aq)+ NO3-(aq)

The oxidation number of N in N2H4 is

What is the correct formula of the salt formed in the neutralization reaction of hydrochloric acid with calcium hydroxide?

Write balanced molecular and net ionic equations for the reaction that would occur between Al(s)and Co(NO3)2(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Write a balanced molecular equation for the reaction that occurs when aqueous solutions of potassium iodide and lead(II)nitrate are combined.

Which of the following compounds is a strong electrolyte?

A 250.mL sample of 0.0328M HCl is partially neutralized by the addition of 100.mL of 0.0245M NaOH. Find the concentration of hydrochloric acid in the resulting solution.

The following reaction is a redox reaction. CaC2(s)+ H2O(l) →\rarr→ HCCH(g)+ CaO(s)

A 20.00 mL sample of 0.1015 M nitric acid is introduced into a flask, and water is added until the volume of the solution reaches 250.mL. What is the concentration of nitric acid in the final solution?

Write balanced molecular and net ionic equations for the reaction that would occur between CaCl2(aq)and Na2CO3(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Identify the element being oxidized in the following reaction. 4Al + 3O2 →\rarr→ 2Al2O3

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

When solid iron(II)hydroxide is added to water, the resulting solution contains 1.4*10-3g of dissolved iron(II)hydroxide per liter of solution. What is the hydroxide ion concentration in this solution?

Calcium sulfate dihydrate (commonly known as gypsum)dissolves in cold water to the extent of 0.241 g per 100.cm3. What is the concentration of calcium ions in this solution?

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

The highest possible oxidation number of carbon is

Identify the elements that are oxidized and reduced in the following reaction. KClO3(aq)+ 6HBr(aq) →\rarr→ KCl(aq)+ 3Br2(l)+ 3H2O(l)

Write the net ionic equation for the following reaction.Aqueous iron(III)sulfate is added to aqueous sodium sulfide to produce solid iron(III)sulfide and aqueous sodium sulfate.

Define solution, solute, and solvent.

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

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

The following equation is an example of a net ionic equation. Na⁺(aq)+ Br^-(aq)+ Ag⁺(aq)+ NO₃^-(aq) $\rarr$ AgBr(s)+ Na⁺(aq)+ NO₃^-(aq)

The oxidation number of N in N₂H₄ is

Write balanced molecular and net ionic equations for the reaction that would occur between Al(s)and Co(NO₃)₂(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

The following reaction is a redox reaction. CaC₂(s)+ H₂O(l) $\rarr$ HCCH(g)+ CaO(s)

Write balanced molecular and net ionic equations for the reaction that would occur between CaCl₂(aq)and Na₂CO₃(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Identify the element being oxidized in the following reaction. 4Al + 3O₂ $\rarr$ 2Al₂O₃

When solid iron(II)hydroxide is added to water, the resulting solution contains 1.4*10^-3g of dissolved iron(II)hydroxide per liter of solution. What is the hydroxide ion concentration in this solution?

Calcium sulfate dihydrate (commonly known as gypsum)dissolves in cold water to the extent of 0.241 g per 100.cm³. What is the concentration of calcium ions in this solution?

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

Identify the elements that are oxidized and reduced in the following reaction. KClO₃(aq)+ 6HBr(aq) $\rarr$ KCl(aq)+ 3Br₂(l)+ 3H₂O(l)