Question 1

Choose the INCORRECT statement.

Accepted Answer

A)  Potassium chloride is used in fertilizers. 
B)  All alkali metals react alike. 
C)  Sodium carbonate is called soda ash. 
D)  Sodium carbonate usually comes from natural sources such as dry lake beds. 
E)  Sodium carbonate can be made by the Solvay process. 
A)  Potassium chloride is used in fertilizers. 
B)  All alkali metals react alike. 
C)  Sodium carbonate is called soda ash. 
D)  Sodium carbonate usually comes from natural sources such as dry lake beds. 
E)  Sodium carbonate can be made by the Solvay process.

Question 2

A sample of water has hardness expressed as 160 ppm Ca2+. The sample is passed through an ion exchange column and the Ca2+ ions are replaced by Na+ ions. What is the [Na+] in ppm of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

Accepted Answer

A)  46.0 
B)  92 
C)  184 
D)  320 
E)  80.0 
A)  46.0 
B)  92 
C)  184 
D)  320 
E)  80.0

Question 3

What potential would be expected from a galvanic cell using a magnesium/0.20 M Mg2+ half-cell with a thallium/0.010 M Tl+ half-cell [for Mg2+ + 2e- = Mg, E° = -2.36 V; for Tl+ + e- = Tl, E° = -0.34 V]?

Accepted Answer

A)  3.04 V 
B)  1.92 V 
C)  1.68 V 
D)  2.70 V 
E)  2.02 V 
A)  3.04 V 
B)  1.92 V 
C)  1.68 V 
D)  2.70 V 
E)  2.02 V

Question 4

Tl is different from Al, Ga, and In in that:

Accepted Answer

A)  Tl has a much different electronegativity 
B)  Tl has a much different first ionization energy 
C)  Tl commonly forms compounds with +1 oxidation state 
D)  Tl forms metal hydroxides that are amphoteric 
E)  Tl commonly forms compounds with +3 oxidation state 
A)  Tl has a much different electronegativity 
B)  Tl has a much different first ionization energy 
C)  Tl commonly forms compounds with +1 oxidation state 
D)  Tl forms metal hydroxides that are amphoteric 
E)  Tl commonly forms compounds with +3 oxidation state

Question 5

Sodium will most readily form which of the following compounds?

Accepted Answer

A)  Na3As 
B)  Na3P 
C)  NaCl 
D)  Na4P 
E)  As3Na 
A)  Na3As 
B)  Na3P 
C)  NaCl 
D)  Na4P 
E)  As3Na

Question 6

Complete and balance the following equation.
CaC2(s) + H2O(l) →
Please include states.

Accepted Answer

CaC₂(s) + 2

Question 7

Choose the INCORRECT statement about magnesium.

Accepted Answer

A)  Magnesium is valued for its light weight. 
B)  It has a lower density than any other structural metal. 
C)  Aircraft parts are made from magnesium alloys. 
D)  It is a good oxidizing agent. 
E)  It is often used as a sacrificial anode. 
A)  Magnesium is valued for its light weight. 
B)  It has a lower density than any other structural metal. 
C)  Aircraft parts are made from magnesium alloys. 
D)  It is a good oxidizing agent. 
E)  It is often used as a sacrificial anode.

Question 8

Which of the following statements about the use of sodium is FALSE?

Accepted Answer

A)  Sodium vapor lamps are used outdoors. 
B)  Sodium is used in reactors because it has a low melting point. 
C)  Sodium is used in reactors because it has a high boiling point. 
D)  Sodium is used in reactors because it has a high thermal conductivity. 
E)  A typical sodium vapor lamp uses several grams of sodium. 
A)  Sodium vapor lamps are used outdoors. 
B)  Sodium is used in reactors because it has a low melting point. 
C)  Sodium is used in reactors because it has a high boiling point. 
D)  Sodium is used in reactors because it has a high thermal conductivity. 
E)  A typical sodium vapor lamp uses several grams of sodium.

Question 9

Complete the following reaction: B(OH)3(aq) + 2 H2O(l) →

Accepted Answer

A)  B ∙ H2O + O2 + H3O+ 
B)  HBO32- + 2 H3O+ 
C)  B + H2 + 5 OH- 
D)  H3O+ + B(OH)4- 
E)  2 H3O+ + HBO3 
A)  B ∙ H2O + O2 + H3O+ 
B)  HBO32- + 2 H3O+ 
C)  B + H2 + 5 OH- 
D)  H3O+ + B(OH)4- 
E)  2 H3O+ + HBO3

Question 10

The Solvay process involves a reaction of sodium chloride, ammonia and carbon dioxide in aqueous solution. Of the various possible products, the one least soluble in water is:

Accepted Answer

A)  ammonium bicarbonate 
B)  "baking soda" (NaHCO3) 
C)  "sal ammoniac" (NH4Cl) 
D)  "table salt" (NaCl) 
E)  "washing soda" (Na2CO3) 
A)  ammonium bicarbonate 
B)  "baking soda" (NaHCO3) 
C)  "sal ammoniac" (NH4Cl) 
D)  "table salt" (NaCl) 
E)  "washing soda" (Na2CO3)

Question 11

How much tin is needed to make a bronze piece that will contain 475 g of copper? Bronze is 90% Cu and 10% Sn by mass.

Accepted Answer

A)  4.3 × 103 g 
B)  890 g 
C)  48 g 
D)  52.8 g 
E)  430 g 
A)  4.3 × 103 g 
B)  890 g 
C)  48 g 
D)  52.8 g 
E)  430 g

Question 12

Choose the INCORRECT statement.

Accepted Answer

A)  The class "detergents" does not include soaps. 
B)  Detergents are cleansing agents. 
C)  Detergents emulsify oils. 
D)  Detergents usually mean synthetic products. 
E)  A soap is a salt of a metal hydroxide and a fatty acid. 
A)  The class "detergents" does not include soaps. 
B)  Detergents are cleansing agents. 
C)  Detergents emulsify oils. 
D)  Detergents usually mean synthetic products. 
E)  A soap is a salt of a metal hydroxide and a fatty acid.

Question 13

In seawater, Mg2+ is about 1350 mg Mg2+/L. How many grams of magnesium are in a pool that is 25 ft by 12 ft by 6 ft? (1 ft = 12 inches and 1 inch = 2.54 cm)

Accepted Answer

A)  4.78 × 102 g 
B)  74.1 g 
C)  6.88 × 104 g 
D)  6.88 × 107 g 
E)  1.64 × 103 g 
A)  4.78 × 102 g 
B)  74.1 g 
C)  6.88 × 104 g 
D)  6.88 × 107 g 
E)  1.64 × 103 g

Question 14

Which of the following statements describes an uncommon use of an element?

Accepted Answer

A)  Aluminum is used in light-weight alloys. 
B)  Gallium is used in the thermite reaction. 
C)  Gallium is used in the electronics industry. 
D)  Indium is used to make low-melting alloys. 
E)  A possible use for thallium is in high-temperature superconductors. 
A)  Aluminum is used in light-weight alloys. 
B)  Gallium is used in the thermite reaction. 
C)  Gallium is used in the electronics industry. 
D)  Indium is used to make low-melting alloys. 
E)  A possible use for thallium is in high-temperature superconductors.

Question 15

Which of the following is an indication that aluminum is a strong reducing agent?

Accepted Answer

A)  2 Al(s) + 6 H+(aq) → 2 Al3+(aq) + 3 H2(g) 
B)  2 Al(s) + Fe2O3(s) → Al2O3(s) + 2 Fe(l) 
C)  2 Al(s) + 3/2 O2(g) → Al2O3(s)   &emsp;  ΔH = -1676 kJ 
D)  2 Al(s) + 2 OH- + 6 H2O(l) → 2 [Al(OH)4]-(aq) + 3 H2(g) 
E)  All of these reactions indicate Al is a strong reducing agent. 
A)  2 Al(s) + 6 H+(aq) → 2 Al3+(aq) + 3 H2(g) 
B)  2 Al(s) + Fe2O3(s) → Al2O3(s) + 2 Fe(l) 
C)  2 Al(s) + 3/2 O2(g) → Al2O3(s)   &emsp;  ΔH = -1676 kJ 
D)  2 Al(s) + 2 OH- + 6 H2O(l) → 2 [Al(OH)4]-(aq) + 3 H2(g) 
E)  All of these reactions indicate Al is a strong reducing agent.

Question 16

A magnesium fire can always be extinguished with carbon dioxide.

Accepted Answer

A) True 
 B)False

Question 17

Strontium is a softer metal than calcium.

Accepted Answer

A) True 
 B)False

Question 18

Write the equation for the electrolysis of molten NaCl.

Accepted Answer

A)  2 NaCl(s) → 2 Na(s) + Cl2(g) 
B)  2 NaCl(l) → 2 Na(l) + Cl2(g) 
C)  2 NaCl(l) → Na2Cl2(s) 
D)  2 NaCl(l) → Na(s) + NaCl2(s) 
E)  There is no reaction. 
A)  2 NaCl(s) → 2 Na(s) + Cl2(g) 
B)  2 NaCl(l) → 2 Na(l) + Cl2(g) 
C)  2 NaCl(l) → Na2Cl2(s) 
D)  2 NaCl(l) → Na(s) + NaCl2(s) 
E)  There is no reaction.

Question 19

Choose the INCORRECT statement.

Accepted Answer

A)  Graphite and diamond are two allotropes of carbon. 
B)  Graphite can be used as a lubricant because sheets of graphite slide over other sheets of graphite. 
C)  Carbon black is finely divided soot used in tires, inks and pigments. 
D)  All carbon containing compounds are the subject of inorganic chemistry. 
E)  Certain groupings of atoms which have the characteristics of a halogen atom are called psuedohalogens. 
A)  Graphite and diamond are two allotropes of carbon. 
B)  Graphite can be used as a lubricant because sheets of graphite slide over other sheets of graphite. 
C)  Carbon black is finely divided soot used in tires, inks and pigments. 
D)  All carbon containing compounds are the subject of inorganic chemistry. 
E)  Certain groupings of atoms which have the characteristics of a halogen atom are called psuedohalogens.

Question 20

Write the chemical equation for the reaction of potassium superoxide with carbon dioxide to produce oxygen.

Accepted Answer

A)  KO(s) + CO2(g) → O2(g) + K(s) + CO(g) 
B)  K2O(s) + CO2(g) → O2(g) + K(s) + KCO(s) 
C)  KO2 + CO2(g) → 2 O2(g) + KC(s) 
D)  2 KO2(s) + 2 CO2(g) → K2CO3(s) + O2(g) 
E)  There is no reaction. 
A)  KO(s) + CO2(g) → O2(g) + K(s) + CO(g) 
B)  K2O(s) + CO2(g) → O2(g) + K(s) + KCO(s) 
C)  KO2 + CO2(g) → 2 O2(g) + KC(s) 
D)  2 KO2(s) + 2 CO2(g) → K2CO3(s) + O2(g) 
E)  There is no reaction.

Exam 21: Main Group Elements I: Groups 1, 2, 13, and 14

Choose the INCORRECT statement.

A sample of water has hardness expressed as 160 ppm Ca2+. The sample is passed through an ion exchange column and the Ca2+ ions are replaced by Na+ ions. What is the [Na+] in ppm of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

What potential would be expected from a galvanic cell using a magnesium/0.20 M Mg2+ half-cell with a thallium/0.010 M Tl+ half-cell [for Mg2+ + 2e- = Mg, E° = -2.36 V; for Tl+ + e- = Tl, E° = -0.34 V]?

Tl is different from Al, Ga, and In in that:

Sodium will most readily form which of the following compounds?

Complete and balance the following equation. CaC2(s) + H2O(l) → Please include states.

Choose the INCORRECT statement about magnesium.

Which of the following statements about the use of sodium is FALSE?

Complete the following reaction: B(OH)3(aq) + 2 H2O(l) →

The Solvay process involves a reaction of sodium chloride, ammonia and carbon dioxide in aqueous solution. Of the various possible products, the one least soluble in water is:

How much tin is needed to make a bronze piece that will contain 475 g of copper? Bronze is 90% Cu and 10% Sn by mass.

Choose the INCORRECT statement.

In seawater, Mg2+ is about 1350 mg Mg2+/L. How many grams of magnesium are in a pool that is 25 ft by 12 ft by 6 ft? (1 ft = 12 inches and 1 inch = 2.54 cm)

Which of the following statements describes an uncommon use of an element?

Which of the following is an indication that aluminum is a strong reducing agent?

A magnesium fire can always be extinguished with carbon dioxide.

Strontium is a softer metal than calcium.

Write the equation for the electrolysis of molten NaCl.

Choose the INCORRECT statement.

Write the chemical equation for the reaction of potassium superoxide with carbon dioxide to produce oxygen.

Matter - Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Additional Aspects

Intermolecular Forces: Liquids and Solids

Solutions and Their Physical Properties

Chemical Kinetics

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Spontaneous Change: Entropy and Free Energy

Electrochemistry

Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

A sample of water has hardness expressed as 160 ppm Ca2⁺. The sample is passed through an ion exchange column and the Ca²⁺ ions are replaced by Na⁺ ions. What is the [Na⁺] in ppm of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

Complete and balance the following equation. CaC₂(s) + H₂O(l) → Please include states.

Complete the following reaction: B(OH)₃(aq) + 2 H₂O(l) →

In seawater, Mg²⁺ is about 1350 mg Mg²⁺/L. How many grams of magnesium are in a pool that is 25 ft by 12 ft by 6 ft? (1 ft = 12 inches and 1 inch = 2.54 cm)