Question 1

Which one of the following compounds is insoluble in water?

Accepted Answer

A)  Na2SO4 
B)  KNO3 
C)  Ba SO4 
D)  Li2CO3 
A)  Na2SO4 
B)  KNO3 
C)  Ba SO4 
D)  Li2CO3

Question 2

Match the following.
-Mg(s) + Cu(NO3)2(aq) → Mg(NO3)2(aq) + Cu(s)

Accepted Answer

A) acid-base 
B) oxidation-reduction 
C) precipitation 
D) gas evolution 
E) combustion 
A) acid-base 
B) oxidation-reduction 
C) precipitation 
D) gas evolution 
E) combustion

Question 3

A solution is prepared by adding 1.40 g of solid NaCl to 50.0 mL of 0.100 mol L-1   . What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Accepted Answer

A)  0.228 mol L-1 
B)  0.579 mol L-1 
C)  0.479 mol L-1 
D)  0.679 mol L-1 
E)  0.128 mol L-1 
A)  0.228 mol L-1 
B)  0.579 mol L-1 
C)  0.479 mol L-1 
D)  0.679 mol L-1 
E)  0.128 mol L-1

Question 4

Aluminum metal reacts with aqueous iron( II) chloride to form aqueous aluminum chloride and iron metal. What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 5

What is the concentration of an AlCl3 solution if 150. mL of the solution contains 450. mg of Cl- ion?

Accepted Answer

A)  2.82 × 10-2 mol L-1 
B)  6.75 × 10-2 mol L-1 
C)  8.46 × 10-2 mol L-1 
D)  2.54 × 10-1 mol L-1 
A)  2.82 × 10-2 mol L-1 
B)  6.75 × 10-2 mol L-1 
C)  8.46 × 10-2 mol L-1 
D)  2.54 × 10-1 mol L-1

Question 6

Find the volume of 0.110 mol L-1 hydrochloric acid necessary to react completely with 1.52 g   .

Accepted Answer

A)  0.658 L 
B)  1.52 L 
C)  1.88 L 
D)  1.01 L 
E)  0.531 L 
A)  0.658 L 
B)  1.52 L 
C)  1.88 L 
D)  1.01 L 
E)  0.531 L

Question 7

How many of the following compounds are soluble in water?
 Cu(OH)2 LiNO3 NH4Br K2S

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 8

What is the oxidation number of the oxygen atom in Na2O2?

Accepted Answer

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

Question 9

What volume (in mL) of a 0.0887 mol L-1 MgF2 solution is needed to make 275.0 mL of a 0.0224 mol L-1 MgF2 solution?

Accepted Answer

A)  72.3 mL 
B)  91.8 mL 
C)  10.9 mL 
D)  69.4 mL 
E)  14.4 mL 
A)  72.3 mL 
B)  91.8 mL 
C)  10.9 mL 
D)  69.4 mL 
E)  14.4 mL

Question 10

Dinitrogen monoxide gas decomposes to form nitrogen gas and oxygen gas. How many grams of oxygen are formed when 10.0 g of dinitrogen monoxide decomposes?

Accepted Answer

A)  0. 275 g 
B)  3.64 g 
C)  7.27 g 
D)  14.5 g 
A)  0. 275 g 
B)  3.64 g 
C)  7.27 g 
D)  14.5 g

Question 11

A homogeneous mixture of two substances is known as ________.

Accepted Answer

A)  a solute 
B)  a solvent 
C)  a solution 
D)  solute-solute interactions 
E)  solvent-solvent interactions 
A)  a solute 
B)  a solvent 
C)  a solution 
D)  solute-solute interactions 
E)  solvent-solvent interactions

Question 12

How many grams of AgNO3 are needed to make 250. mL of a solution that is 0. 135 mol L-1?

Accepted Answer

A)  0.0917 g 
B)  0.174 g 
C)  5.73 g 
D)  91.7 g 
A)  0.0917 g 
B)  0.174 g 
C)  5.73 g 
D)  91.7 g

Question 13

Identify the spectator ions in the following molecular equation: 
KBr(aq) + AgNO3(aq) → AgBr(s) + KNO3(aq)

Accepted Answer

A)  Ag+ and Br- 
B)  K+ and NO3- 
C)  K+ and Br- 
D)  Ag+ and NO3- 
E)  There are no spectator ions in this reaction. 
A)  Ag+ and Br- 
B)  K+ and NO3- 
C)  K+ and Br- 
D)  Ag+ and NO3- 
E)  There are no spectator ions in this reaction.

Question 14

Determine the number of grams H2 formed when 250.0 mL of 0.743 mol L-1 HCl solution reacts with 3.41 × 1023 atoms of Fe according to the following reaction: 
2HCl(aq) + Fe(s) → H2(g) + FeCl2(aq)

Accepted Answer

A)  0.374 g 
B)  1.33 g 
C)  1.14 g 
D)  0.187 g 
E)  1.51 g 
A)  0.374 g 
B)  1.33 g 
C)  1.14 g 
D)  0.187 g 
E)  1.51 g

Question 15

If 294 grams of FeS2 is allowed to react with 176 grams of O2 according to the following unbalanced equation, how many grams of Fe2O3 are produced?
FeS2 + O2 → Fe2O3 + SO2

Accepted Answer

Question 16

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Accepted Answer

A)  HCl + LiOH 
B)  Li2S + HCl 
C)  K2CO3 + HNO3 
D)  MgCl2 + KOH 
E)  All of these solution pairs will produce a precipitate. 
A)  HCl + LiOH 
B)  Li2S + HCl 
C)  K2CO3 + HNO3 
D)  MgCl2 + KOH 
E)  All of these solution pairs will produce a precipitate.

Question 17

Why is sugar water not a good conductor of current?

Accepted Answer

Sugar wate

Question 18

What precipitate is most likely formed from a solution containing 
Ba2+, Na1+, OH1-, and CO32-.

Accepted Answer

A)  NaOH 
B)  BaCO3 
C)  Na2CO3 
D)  Ba(OH)2 
A)  NaOH 
B)  BaCO3 
C)  Na2CO3 
D)  Ba(OH)2

Question 19

How many grams of CH3OH must be added to water to prepare 150 mL of a solution that is 2.0 mol L-1 CH3OH?

Accepted Answer

Question 20

Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid. What is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-number coefficients?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  none of the above 
A)  1 
B)  2 
C)  3 
D)  none of the above

Exam 4: Chemical Reactions and Stoichiometry

Which one of the following compounds is insoluble in water?

Match the following. -Mg(s) + Cu(NO3)2(aq) → Mg(NO3)2(aq) + Cu(s)

A solution is prepared by adding 1.40 g of solid NaCl to 50.0 mL of 0.100 mol L-1 . What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Aluminum metal reacts with aqueous iron( II) chloride to form aqueous aluminum chloride and iron metal. What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients?

What is the concentration of an AlCl3 solution if 150. mL of the solution contains 450. mg of Cl- ion?

Find the volume of 0.110 mol L-1 hydrochloric acid necessary to react completely with 1.52 g .

How many of the following compounds are soluble in water? Cu(OH)2 LiNO3 NH4Br K2S

What is the oxidation number of the oxygen atom in Na2O2?

What volume (in mL) of a 0.0887 mol L-1 MgF2 solution is needed to make 275.0 mL of a 0.0224 mol L-1 MgF2 solution?

Dinitrogen monoxide gas decomposes to form nitrogen gas and oxygen gas. How many grams of oxygen are formed when 10.0 g of dinitrogen monoxide decomposes?

A homogeneous mixture of two substances is known as ________.

How many grams of AgNO3 are needed to make 250. mL of a solution that is 0. 135 mol L-1?

Identify the spectator ions in the following molecular equation: KBr(aq) + AgNO3(aq) → AgBr(s) + KNO3(aq)

Determine the number of grams H2 formed when 250.0 mL of 0.743 mol L-1 HCl solution reacts with 3.41 × 1023 atoms of Fe according to the following reaction: 2HCl(aq) + Fe(s) → H2(g) + FeCl2(aq)

If 294 grams of FeS2 is allowed to react with 176 grams of O2 according to the following unbalanced equation, how many grams of Fe2O3 are produced? FeS2 + O2 → Fe2O3 + SO2

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Why is sugar water not a good conductor of current?

What precipitate is most likely formed from a solution containing Ba2+, Na1+, OH1-, and CO32-.

How many grams of CH3OH must be added to water to prepare 150 mL of a solution that is 2.0 mol L-1 CH3OH?

Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid. What is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-number coefficients?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Match the following. -Mg(s) + Cu(NO₃)₂(aq) → Mg(NO₃)₂(aq) + Cu(s)

A solution is prepared by adding 1.40 g of solid NaCl to 50.0 mL of 0.100 mol L^-1 . What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

What is the concentration of an AlCl₃ solution if 150. mL of the solution contains 450. mg of Cl^- ion?

Find the volume of 0.110 mol L^-1 hydrochloric acid necessary to react completely with 1.52 g .

How many of the following compounds are soluble in water? Cu(OH)₂ LiNO₃ NH₄Br K₂S

What is the oxidation number of the oxygen atom in Na₂O₂?

What volume (in mL) of a 0.0887 mol L^-1 MgF₂ solution is needed to make 275.0 mL of a 0.0224 mol L^-1 MgF₂solution?

How many grams of AgNO₃ are needed to make 250. mL of a solution that is 0. 135 mol L^-1?

Identify the spectator ions in the following molecular equation: KBr(aq) + AgNO₃(aq) → AgBr(s) + KNO₃(aq)

Determine the number of grams H₂ formed when 250.0 mL of 0.743 mol L^-1 HCl solution reacts with 3.41 × 10²³ atoms of Fe according to the following reaction: 2HCl(aq) + Fe(s) → H₂(g) + FeCl₂(aq)

If 294 grams of FeS₂ is allowed to react with 176 grams of O₂ according to the following unbalanced equation, how many grams of Fe₂O₃ are produced? FeS₂ + O₂ → Fe₂O₃ + SO₂

What precipitate is most likely formed from a solution containing Ba²⁺, Na¹⁺, OH^1-, and CO₃^2-.

How many grams of CH₃OH must be added to water to prepare 150 mL of a solution that is 2.0 mol L^-1 CH₃OH?