Question 1

Write the equation for the production of potassium metal from potassium chloride.

Accepted Answer

A)  KCl(s) + Na(s)   NaCl(s) + K(s) 
B)  KCl(s) + Na(s)   KNaCl(s) 
C)  KCl(l) + Na(l)   NaCl(l) + K(g) 
D)  KCl(l) + Na(g)   NaCl(s) + K(s) 
E)  There is no reaction. 
A)  KCl(s) + Na(s)   NaCl(s) + K(s) 
B)  KCl(s) + Na(s)   KNaCl(s) 
C)  KCl(l) + Na(l)   NaCl(l) + K(g) 
D)  KCl(l) + Na(g)   NaCl(s) + K(s) 
E)  There is no reaction.

Question 2

What volume of oxygen gas, measured at STP, would be required for the preparation of 39.0 g of sodium peroxide from sufficient sodium metal?

Accepted Answer

A)  11.2 L 
B)  9.6 L 
C)  7.4 L 
D)  5.6 L 
E)  2.2 L 
A)  11.2 L 
B)  9.6 L 
C)  7.4 L 
D)  5.6 L 
E)  2.2 L

Question 3

When sodium and potassium react with excess oxygen, the major products are:

Accepted Answer

A)  Na2O2 and KO2 
B)  NaO2 and KO2 
C)  Na2O and KO2 
D)  Na2O2 and K2O2 
A)  Na2O2 and KO2 
B)  NaO2 and KO2 
C)  Na2O and KO2 
D)  Na2O2 and K2O2

Question 4

Quartz and mica are examples of:

Accepted Answer

A)  silanols 
B)  silanes 
C)  silicones 
D)  silicates 
E)  isomers 
A)  silanols 
B)  silanes 
C)  silicones 
D)  silicates 
E)  isomers

Question 5

Choose the INCORRECT statement.

Accepted Answer

A)  Sodium chloride may be produced by electrolysis of sodium metal and chlorine gas. 
B)  Sodium chloride is one of the most used minerals in the production of chemicals. 
C)  Sodium chloride is used to preserve meat and fish. 
D)  Sodium chloride is used to control ice on roads. 
E)  Sodium chloride is used to regenerate water softeners. 
A)  Sodium chloride may be produced by electrolysis of sodium metal and chlorine gas. 
B)  Sodium chloride is one of the most used minerals in the production of chemicals. 
C)  Sodium chloride is used to preserve meat and fish. 
D)  Sodium chloride is used to control ice on roads. 
E)  Sodium chloride is used to regenerate water softeners.

Question 6

What weight of lead sulfate is produced during discharge of a lead storage battery over a 3.0 hour period at an average current of 0.50 amp? [Hint: Consider both electrode processes.]

Accepted Answer

A)  8.6 g 
B)  17 g 
C)  26 g 
D)  53 g 
E)  61 g 
A)  8.6 g 
B)  17 g 
C)  26 g 
D)  53 g 
E)  61 g

Question 7

Choose the INCORRECT statement about carbon.

Accepted Answer

A)  Carbon does not form multiple bonds. 
B)  There are two very common allotropes: diamond and graphite. 
C)  There is a strong tendency for catenation. 
D)  Carbon can be hybridized into sp, sp2 and sp3 orbitals. 
E)  Carbon primarily forms two gaseous oxides: CO and CO2. 
A)  Carbon does not form multiple bonds. 
B)  There are two very common allotropes: diamond and graphite. 
C)  There is a strong tendency for catenation. 
D)  Carbon can be hybridized into sp, sp2 and sp3 orbitals. 
E)  Carbon primarily forms two gaseous oxides: CO and CO2.

Question 8

Choose the INCORRECT statement.

Accepted Answer

A)  Amphoteric means useful in photography. 
B)  Tin disease, tin pest, or tin plague is actually just a second form of tin. 
C)  A solder is a low melting alloy used to join wires or pieces of metal. 
D)  Roasting an ore is heating that ore in air. 
E)  Pewter is an alloy made mainly of tin. 
A)  Amphoteric means useful in photography. 
B)  Tin disease, tin pest, or tin plague is actually just a second form of tin. 
C)  A solder is a low melting alloy used to join wires or pieces of metal. 
D)  Roasting an ore is heating that ore in air. 
E)  Pewter is an alloy made mainly of tin.

Question 9

Choose the INCORRECT statement.

Accepted Answer

A)  A glass is an amorphous solid. 
B)  An amorphous solid has order over relatively short distances. 
C)  A sol is a colloidal dispersion of particles in a liquid. 
D)  Silicones are materials consisting of molecules with long silicon-oxygen chains. 
E)  Silicates are silicon-hydrogen containing compounds. 
A)  A glass is an amorphous solid. 
B)  An amorphous solid has order over relatively short distances. 
C)  A sol is a colloidal dispersion of particles in a liquid. 
D)  Silicones are materials consisting of molecules with long silicon-oxygen chains. 
E)  Silicates are silicon-hydrogen containing compounds.

Question 10

Choose the INCORRECT statement.

Accepted Answer

A)  Diborane is B2H6. 
B)  B(OH)3 boric acid is a monoprotic acid. 
C)  Being electron deficient makes boron compounds strong Lewis acids. 
D)  The B-H-B three-center bond has only two electrons. 
E)  Boron is one of several nonmetals in group 13. 
A)  Diborane is B2H6. 
B)  B(OH)3 boric acid is a monoprotic acid. 
C)  Being electron deficient makes boron compounds strong Lewis acids. 
D)  The B-H-B three-center bond has only two electrons. 
E)  Boron is one of several nonmetals in group 13.

Question 11

Strontium hydroxide is more soluble in water than is calcium hydroxide.

Accepted Answer

A) True 
 B)False

Question 12

What is the pH of a solution labeled "0.020 M Potassium Hypochlorite"? [Ka for hypochlorous acid is 2.9 × 10-8]

Accepted Answer

A)  1.70 
B)  4.62 
C)  8.16 
D)  9.90 
E)  12.30 
A)  1.70 
B)  4.62 
C)  8.16 
D)  9.90 
E)  12.30

Question 13

Choose the INCORRECT equation.

Accepted Answer

A)  CaO + 3 C   CaC2 + CO 
B)  CaC2 + 2 H2O → Ca(OH)2 + C2H2 
C)  CH4 + 4 S → CS2 + 2 H2S 
D)  (CN)2 + 2 OH- → 2 HOCN 
E)  CH4 + 4 Cl2 → CCl4 + 4 HCl 
A)  CaO + 3 C   CaC2 + CO 
B)  CaC2 + 2 H2O → Ca(OH)2 + C2H2 
C)  CH4 + 4 S → CS2 + 2 H2S 
D)  (CN)2 + 2 OH- → 2 HOCN 
E)  CH4 + 4 Cl2 → CCl4 + 4 HCl

Question 14

At the start of 1980, the average lead content in blood had dropped to about 10 μg/dL blood. How many mg is that in 2.0 gallons of blood? (1 gallon = 3.7854 L)

Accepted Answer

A)  750 mg 
B)  0.80 mg 
C)  0.75 mg 
D)  0.20 mg 
E)  80 mg 
A)  750 mg 
B)  0.80 mg 
C)  0.75 mg 
D)  0.20 mg 
E)  80 mg

Question 15

What mass of potassium superoxide could be prepared from 15.6 g of potassium metal and excess oxygen?

Accepted Answer

A)  37.6 g 
B)  15.6 g 
C)  22.0 g 
D)  28.4 g 
E)  0.399 g 
A)  37.6 g 
B)  15.6 g 
C)  22.0 g 
D)  28.4 g 
E)  0.399 g

Question 16

Which incorrectly shows the main product of reaction of the indicated alkali metal with excess oxygen?

Accepted Answer

A)  Li/Li2O 
B)  Na/Na2O2 
C)  K/K2O2 
D)  Rb/RbO2 
E)  Cs/CsO2 
A)  Li/Li2O 
B)  Na/Na2O2 
C)  K/K2O2 
D)  Rb/RbO2 
E)  Cs/CsO2

Question 17

If in a lead storage battery the reaction at the cathode is: PbO2(s) + 4 H+ + SO42- + 2e- → PbSO4(s) + 2 H2O
How many grams of lead sulfate are formed on one plate if 20. amps average current occurs for 2.0 minutes? Assume 100% efficiency.

Accepted Answer

A)  0.063 g 
B)  0.13 g 
C)  3.77 g 
D)  7.54 g 
E)  requires additional information 
A)  0.063 g 
B)  0.13 g 
C)  3.77 g 
D)  7.54 g 
E)  requires additional information

Question 18

The formula for barium superoxide is BaO2.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following statements about lithium is FALSE?

Accepted Answer

A)  It is used as an alloying agent with aluminum and magnesium. 
B)  Lithium alloys are high strength and low density. 
C)  The alloys are important in aerospace and aircraft industries. 
D)  Lithium is used in batteries because it is difficult to oxidize. 
E)  An advantage to lithium batteries is light weight. 
A)  It is used as an alloying agent with aluminum and magnesium. 
B)  Lithium alloys are high strength and low density. 
C)  The alloys are important in aerospace and aircraft industries. 
D)  Lithium is used in batteries because it is difficult to oxidize. 
E)  An advantage to lithium batteries is light weight.

Question 20

A sample of water has hardness expressed as 1.6 × 102 ppm Ca2+. The sample is passed through an ion exchange column and the Ca2+ ions are replaced by H+ ions. What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

Accepted Answer

A)  2.09 
B)  -.80 
C)  1.10 
D)  7.00 
E)  2.40 
A)  2.09 
B)  -.80 
C)  1.10 
D)  7.00 
E)  2.40

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

Write the equation for the production of potassium metal from potassium chloride.

What volume of oxygen gas, measured at STP, would be required for the preparation of 39.0 g of sodium peroxide from sufficient sodium metal?

When sodium and potassium react with excess oxygen, the major products are:

Quartz and mica are examples of:

Choose the INCORRECT statement.

What weight of lead sulfate is produced during discharge of a lead storage battery over a 3.0 hour period at an average current of 0.50 amp? [Hint: Consider both electrode processes.]

Choose the INCORRECT statement about carbon.

Choose the INCORRECT statement.

Choose the INCORRECT statement.

Choose the INCORRECT statement.

Strontium hydroxide is more soluble in water than is calcium hydroxide.

What is the pH of a solution labeled "0.020 M Potassium Hypochlorite"? [Ka for hypochlorous acid is 2.9 × 10-8]

Choose the INCORRECT equation.

At the start of 1980, the average lead content in blood had dropped to about 10 μg/dL blood. How many mg is that in 2.0 gallons of blood? (1 gallon = 3.7854 L)

What mass of potassium superoxide could be prepared from 15.6 g of potassium metal and excess oxygen?

Which incorrectly shows the main product of reaction of the indicated alkali metal with excess oxygen?

If in a lead storage battery the reaction at the cathode is: PbO2(s) + 4 H+ + SO42- + 2e- → PbSO4(s) + 2 H2O How many grams of lead sulfate are formed on one plate if 20. amps average current occurs for 2.0 minutes? Assume 100% efficiency.

The formula for barium superoxide is BaO2.

Which of the following statements about lithium is FALSE?

A sample of water has hardness expressed as 1.6 × 102 ppm Ca2+. The sample is passed through an ion exchange column and the Ca2+ ions are replaced by H+ ions. What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

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

What is the pH of a solution labeled "0.020 M Potassium Hypochlorite"? [Ka for hypochlorous acid is 2.9 × 10^-8]

If in a lead storage battery the reaction at the cathode is: PbO₂(s) + 4 H⁺ + SO₄^2- + 2e- → PbSO₄(s) + 2 H₂O How many grams of lead sulfate are formed on one plate if 20. amps average current occurs for 2.0 minutes? Assume 100% efficiency.

The formula for barium superoxide is BaO₂.

A sample of water has hardness expressed as 1.6 × 10² ppm Ca²⁺. The sample is passed through an ion exchange column and the Ca²⁺ ions are replaced by H⁺ ions. What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)