Question 1

Which choice gives the correct oxidation numbers for all three elements in Rb2SO3 in the order that the elements are shown in the formula?

Accepted Answer

A) -2, +6, -2 
B) -1, +4, -3 
C) +2, +4, -2 
D) +1, +4, -2 
E) +1, +6, -6 
A) -2, +6, -2 
B) -1, +4, -3 
C) +2, +4, -2 
D) +1, +4, -2 
E) +1, +6, -6

Question 2

Identify the following compound as an electrolyte or nonelectrolyte: MgCl2.

Accepted Answer

Question 3

Determine the oxidation number of each of the elements BaNaPO4?

Accepted Answer

the oxidation number of Ba +2;

Question 4

Which of the following represents a metal displacement reaction?

Accepted Answer

A) 2NaN3(s)$\rarr$2Na(s)+ 3N2(g) 
B) Fe2O3(s)+ 2Al(s)$\rarr$ 2Fe(s)+ Al2O3(s) 
C) 3NO2(g)+ H2O(l)$\rarr$2HNO3(aq)+ NO(g) 
D) 2P(s)+ 3Cl2(g)$\rarr$ 2PCl3(g) 
E) 2ZnS(s)+ 3O2(g)$\rarr$2ZnO(s)+ 2SO2(g) 
A) 2NaN3(s)$\rarr$2Na(s)+ 3N2(g) 
B) Fe2O3(s)+ 2Al(s)$\rarr$ 2Fe(s)+ Al2O3(s) 
C) 3NO2(g)+ H2O(l)$\rarr$2HNO3(aq)+ NO(g) 
D) 2P(s)+ 3Cl2(g)$\rarr$ 2PCl3(g) 
E) 2ZnS(s)+ 3O2(g)$\rarr$2ZnO(s)+ 2SO2(g)

Question 5

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s)+ 2HCl(aq)$\rarr$ZnCl2(aq)+ H2(g)
What mass of hydrogen gas is produced when a 7.35 g chunk of zinc dissolves in 500. mL of 1.200M HCl?

Accepted Answer

A) 0.605 g 
B) 0.113 g 
C) 0.302 g 
D) 0.453 g 
E) 0.227 g 
A) 0.605 g 
B) 0.113 g 
C) 0.302 g 
D) 0.453 g 
E) 0.227 g

Question 6

Hydrogen is oxidized in the following chemical reaction.
H2 + Cl2 $\rarr$ 2HCl

Accepted Answer

A) True 
 B)False

Question 7

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 8

In the following redox reaction 4NH3 + 3Ca(ClO)2 $\rarr$ 2N2 + 6H2O + 3CaCl2
 which element is oxidized and which is reduced?

Accepted Answer

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

Question 9

When 38.0 mL of 0.1250 M H2SO4 is added to 100.mL of a solution of PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If the recovered PbSO4 is found to have a mass of 0.0471 g, what was the concentration of iodide ions in the original solution?

Accepted Answer

A) 3.10 * 10-4 M 
B) 1.55 * 10-4 M 
C) 6.20 * 10-3 M 
D) 3.11 * 10-3 M 
E) 1.55 * 10-3 M 
A) 3.10 * 10-4 M 
B) 1.55 * 10-4 M 
C) 6.20 * 10-3 M 
D) 3.11 * 10-3 M 
E) 1.55 * 10-3 M

Question 10

Identify the following compound as a strong electrolyte, weak electrolyte, or nonelectrolyte: NH3.

Accepted Answer

Question 11

A piece of lead metal was added to an aqueous solution of copper(II)nitrate, and within a few minutes it was observed that the lead turned black and crumbled, and the blue solution characteristic of copper(II)ions faded.(NOTE: Lead forms a 2+ ion when it reacts.)
Write the balanced chemical equation for this reaction.

Accepted Answer

Pb(s)+ Cu(

Question 12

If 145 grams of potassium nitrate were added to water to make 1,500 mL of solution, what would be the molarity of the resulting solution?

Accepted Answer

The answer of If 145 grams of potassium nitrate were...

Question 13

Give an example of a triprotic acid.

Accepted Answer

The answer of Give an example of a triprotic acid....

Question 14

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

Accepted Answer

Question 15

Define precipitate and illustrate with an example.

Accepted Answer

(Answers will vary.)A precipit

Question 16

The oxidation number of Mn in KMnO4 is

Accepted Answer

A) +8 
B) +7 
C) +5 
D) -7 
E) -8 
A) +8 
B) +7 
C) +5 
D) -7 
E) -8

Question 17

What element is oxidized in the following chemical reaction? 3Cu + 8HNO3 $\rarr$3Cu(NO3)2 + 2NO + 4H2O

Accepted Answer

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

Question 18

Which of the following is the correct net ionic equation for the reaction that occurs when solutions of Pb(NO3)2 and NH4Cl are mixed?

Accepted Answer

A) Pb(NO3)2(aq)+ 2NH4Cl(aq)$\rarr$NH4NO3(aq)+ PbCl2(s) 
B) Pb2+(aq)+ 2Cl-(aq)$\rarr$PbCl2(s) 
C) Pb2+(aq)+ 2NO3- (aq)+ 2NH   (aq)+ 2Cl-(aq)$\rarr$ 2NH   (aq)+ 2NO3- (aq)+ PbCl2(s) 
D) NH4+(aq)+ NO3- (aq)$\rarr$2NH4NO3(s) 
E) No reaction occurs when the solutions are mixed. 
A) Pb(NO3)2(aq)+ 2NH4Cl(aq)$\rarr$NH4NO3(aq)+ PbCl2(s) 
B) Pb2+(aq)+ 2Cl-(aq)$\rarr$PbCl2(s) 
C) Pb2+(aq)+ 2NO3- (aq)+ 2NH   (aq)+ 2Cl-(aq)$\rarr$ 2NH   (aq)+ 2NO3- (aq)+ PbCl2(s) 
D) NH4+(aq)+ NO3- (aq)$\rarr$2NH4NO3(s) 
E) No reaction occurs when the solutions are mixed.

Question 19

Lithium metal dissolves in water to yield hydrogen gas and aqueous lithium hydroxide. What is the final concentration of hydroxide ions when 5.500 g of lithium metal is dropped into 750.mL of water?

Accepted Answer

A) 1.06 M 
B) 0.528 M 
C) 2.11 M 
D) 0.792 M 
E) 0.943 M 
A) 1.06 M 
B) 0.528 M 
C) 2.11 M 
D) 0.792 M 
E) 0.943 M

Question 20

Predict the products of the following single replacement reaction. Fe(s)+ CuSO4(aq)$\rarr$

Accepted Answer

A) Cu(s)+ FeSO4(aq) 
B) Fe(s)+ Cu(s)+ SO4(aq) 
C) CuS(s)+ Fe2SO4(aq) 
D) FeCuSO4(aq) 
E) FeO(s)+ CuSO3(aq) 
A) Cu(s)+ FeSO4(aq) 
B) Fe(s)+ Cu(s)+ SO4(aq) 
C) CuS(s)+ Fe2SO4(aq) 
D) FeCuSO4(aq) 
E) FeO(s)+ CuSO3(aq)

Exam 4: Reactions in Aqueous Solution

Which choice gives the correct oxidation numbers for all three elements in Rb2SO3 in the order that the elements are shown in the formula?

Identify the following compound as an electrolyte or nonelectrolyte: MgCl2.

Determine the oxidation number of each of the elements BaNaPO4?

Which of the following represents a metal displacement reaction?

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s)+ 2HCl(aq) →\rarr→ ZnCl2(aq)+ H2(g) What mass of hydrogen gas is produced when a 7.35 g chunk of zinc dissolves in 500. mL of 1.200M HCl?

Hydrogen is oxidized in the following chemical reaction. H2 + Cl2 →\rarr→ 2HCl

The oxidation number of N in NaNO3 is

In the following redox reaction 4NH3 + 3Ca(ClO)2 →\rarr→ 2N2 + 6H2O + 3CaCl2 which element is oxidized and which is reduced?

When 38.0 mL of 0.1250 M H2SO4 is added to 100.mL of a solution of PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If the recovered PbSO4 is found to have a mass of 0.0471 g, what was the concentration of iodide ions in the original solution?

Identify the following compound as a strong electrolyte, weak electrolyte, or nonelectrolyte: NH3.

If 145 grams of potassium nitrate were added to water to make 1,500 mL of solution, what would be the molarity of the resulting solution?

Give an example of a triprotic acid.

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

Define precipitate and illustrate with an example.

The oxidation number of Mn in KMnO4 is

What element is oxidized in the following chemical reaction? 3Cu + 8HNO3 →\rarr→ 3Cu(NO3)2 + 2NO + 4H2O

Which of the following is the correct net ionic equation for the reaction that occurs when solutions of Pb(NO3)2 and NH4Cl are mixed?

Lithium metal dissolves in water to yield hydrogen gas and aqueous lithium hydroxide. What is the final concentration of hydroxide ions when 5.500 g of lithium metal is dropped into 750.mL of water?

Predict the products of the following single replacement reaction. Fe(s)+ CuSO4(aq) →\rarr→

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

Which choice gives the correct oxidation numbers for all three elements in Rb₂SO₃ in the order that the elements are shown in the formula?

Identify the following compound as an electrolyte or nonelectrolyte: MgCl₂.

Determine the oxidation number of each of the elements BaNaPO₄?

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s)+ 2HCl(aq) $\rarr$ ZnCl₂(aq)+ H₂(g) What mass of hydrogen gas is produced when a 7.35 g chunk of zinc dissolves in 500. mL of 1.200M HCl?

Hydrogen is oxidized in the following chemical reaction. H₂ + Cl₂ $\rarr$ 2HCl

The oxidation number of N in NaNO₃ is

In the following redox reaction 4NH₃ + 3Ca(ClO)₂ $\rarr$ 2N₂ + 6H₂O + 3CaCl₂ which element is oxidized and which is reduced?

Identify the following compound as a strong electrolyte, weak electrolyte, or nonelectrolyte: NH₃.

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

The oxidation number of Mn in KMnO₄ is

What element is oxidized in the following chemical reaction? 3Cu + 8HNO₃ $\rarr$ 3Cu(NO₃)₂ + 2NO + 4H₂O

Which of the following is the correct net ionic equation for the reaction that occurs when solutions of Pb(NO₃)₂ and NH₄Cl are mixed?

Predict the products of the following single replacement reaction. Fe(s)+ CuSO₄(aq) $\rarr$