Question 1

Ca₂+, K+ and Cl- have the same number of electrons.

Accepted Answer

A) True 
 B)False

Question 2

Corrosion of a ship's hull can be inhibited if another metal that is more active is attached to the hull.

Accepted Answer

A) True 
 B)False

Question 3

Assign oxidation states to each of the atoms in the following chemical species:
a) SiO₂
b) NO-
c) TlCl
d) V2O5

Accepted Answer

a) Si +4, O -2
b) N

Question 4

Which of the following is the most easily reduced?

Accepted Answer

A)  K+ 
B)  Na+ 
C)  Au+ 
D)  Hg2+ 
A)  K+ 
B)  Na+ 
C)  Au+ 
D)  Hg2+

Question 5

What is the oxidation state of the nitrogen atom in the compound NCL₃?

Accepted Answer

A)  0 
B)  +3 
C)  +5 
D)  -3 
A)  0 
B)  +3 
C)  +5 
D)  -3

Question 6

The oxidation state of an atom in its natural occurring elemental form is always equal to zero.

Accepted Answer

A) True 
 B)False

Question 7

Which of the reactions above are examples of electron transfer reactions?
(a) Ba(OH)2 + H₂SO₄ → 2H₂O + BaSO₄
(b) NaOH + HCl → NaCl + H₂O
(c) 2H₂ + O₂ → 2H₂O
(d) C₂H₆O + 3O₂ → 2CO₂ + 3H₂O

Accepted Answer

The answer of Which of the reactions above are examples...

Question 8

Match each compound with its corresponding chlorine oxidation state.
-sodium chlorate

Accepted Answer

A) +3 
B) +5 
C) -1 
D) +1 
E) +7 
A) +3 
B) +5 
C) -1 
D) +1 
E) +7

Question 9

In a chemical reaction the easiest electrons to be transferred are the core electrons (also called inner shell electrons).

Accepted Answer

A) True 
 B)False

Question 10

Match each compound with its corresponding sulfur oxidation state.
-sodium sulfate

Accepted Answer

A) +4 
B) 0 
C) +6 
D) +2 
E) -2 
A) +4 
B) 0 
C) +6 
D) +2 
E) -2

Question 11

Match each compound with its corresponding sulfur oxidation state.
-sulfur dioxide

Accepted Answer

A) +4 
B) 0 
C) +6 
D) +2 
E) -2 
A) +4 
B) 0 
C) +6 
D) +2 
E) -2

Question 12

Identify the element that was oxidized. 3 P + 5 HNO₃ + 2 H₂O → 5 NO + 3 H₃PO₄

Accepted Answer

A)  phosphorus 
B)  nitrogen 
C)  oxygen 
D)  No elements were either oxidized or reduced. 
A)  phosphorus 
B)  nitrogen 
C)  oxygen 
D)  No elements were either oxidized or reduced.

Question 13

Which of the following elements may not have an oxidation number of -1?

Accepted Answer

A)  chlorine 
B)  hydrogen 
C)  sodium 
D)  fluorine 
A)  chlorine 
B)  hydrogen 
C)  sodium 
D)  fluorine

Question 14

Identify the reduced species in the following chemical process (a lead storage battery). Pb + PbO₂ + 2H+ + 2HSO₄- → 2PbSO₄ + 2H₂O.

Accepted Answer

A)  PbO₂ 
B)  Pb 
C)  H+ 
D)  2HSO₄- 
A)  PbO₂ 
B)  Pb 
C)  H+ 
D)  2HSO₄-

Question 15

More active metals lose electrons to ions of less active metals.

Accepted Answer

A) True 
 B)False

Question 16

The oxidation state of oxygen gas is ________.

Accepted Answer

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

Question 17

Match each compound with its corresponding sulfur oxidation state.
-sulfur, S8

Accepted Answer

A) +4 
B) 0 
C) +6 
D) +2 
E) -2 
A) +4 
B) 0 
C) +6 
D) +2 
E) -2

Question 18

Consult the EMF activity series and predict which of the following changes will occur if an 24K gold ring (pure gold) is placed in an aqueous solution containing hydrochloric acid.

Accepted Answer

A)  Nothing at all will happen (no reaction). 
B)  Hydrogen will be further oxidized. 
C)  Gold will be reduced. 
D)  Gold will be oxidized. 
A)  Nothing at all will happen (no reaction). 
B)  Hydrogen will be further oxidized. 
C)  Gold will be reduced. 
D)  Gold will be oxidized.

Question 19

Match each element with its most likely oxidation state.
-arsenic

Accepted Answer

A) +2 
B) -1 
C) -3, +3, 5 
D) -2 
E) +4,-4
F)+3
G)+1
H)-3 
A) +2 
B) -1 
C) -3, +3, 5 
D) -2 
E) +4,-4
F)+3
G)+1
H)-3

Question 20

Match each compound with its corresponding chlorine oxidation state.
-sodium chloride

Accepted Answer

A) +3 
B) +5 
C) -1 
D) +1 
E) +7 
A) +3 
B) +5 
C) -1 
D) +1 
E) +7

Ca^₂+, K+ and Cl- have the same number of electrons.

Corrosion of a ship's hull can be inhibited if another metal that is more active is attached to the hull.

Assign oxidation states to each of the atoms in the following chemical species: a) SiO₂ b) NO- c) TlCl d) V₂O₅

Which of the following is the most easily reduced?

What is the oxidation state of the nitrogen atom in the compound NCL₃?

The oxidation state of an atom in its natural occurring elemental form is always equal to zero.

Which of the reactions above are examples of electron transfer reactions? (a) Ba(OH)2 + H₂SO₄ → 2H₂O + BaSO₄ (b) NaOH + HCl → NaCl + H₂O (c) 2H₂ + O₂ → 2H₂O (d) C₂H₆O + 3O₂ → 2CO₂ + 3H₂O

Match each compound with its corresponding chlorine oxidation state. -sodium chlorate

In a chemical reaction the easiest electrons to be transferred are the core electrons (also called inner shell electrons).

Match each compound with its corresponding sulfur oxidation state. -sodium sulfate

Match each compound with its corresponding sulfur oxidation state. -sulfur dioxide

Identify the element that was oxidized. 3 P + 5 HNO₃ + 2 H₂O → 5 NO + 3 H₃PO₄

Which of the following elements may not have an oxidation number of -1?

Identify the reduced species in the following chemical process (a lead storage battery). Pb + PbO₂ + 2H+ + 2HSO₄- → 2PbSO₄ + 2H₂O.

More active metals lose electrons to ions of less active metals.

The oxidation state of oxygen gas is ________.

Match each compound with its corresponding sulfur oxidation state. -sulfur, S8

Consult the EMF activity series and predict which of the following changes will occur if an 24K gold ring (pure gold) is placed in an aqueous solution containing hydrochloric acid.

Match each element with its most likely oxidation state. -arsenic

Match each compound with its corresponding chlorine oxidation state. -sodium chloride

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

Exam 10: Electron Transfer in Chemical Reactions

Ca₂+, K+ and Cl- have the same number of electrons.

Corrosion of a ship's hull can be inhibited if another metal that is more active is attached to the hull.

Assign oxidation states to each of the atoms in the following chemical species: a) SiO₂ b) NO- c) TlCl d) V2O5

Which of the following is the most easily reduced?

What is the oxidation state of the nitrogen atom in the compound NCL₃?

The oxidation state of an atom in its natural occurring elemental form is always equal to zero.

Which of the reactions above are examples of electron transfer reactions? (a) Ba(OH)2 + H₂SO₄ → 2H₂O + BaSO₄ (b) NaOH + HCl → NaCl + H₂O (c) 2H₂ + O₂ → 2H₂O (d) C₂H₆O + 3O₂ → 2CO₂ + 3H₂O

Match each compound with its corresponding chlorine oxidation state. -sodium chlorate

In a chemical reaction the easiest electrons to be transferred are the core electrons (also called inner shell electrons).

Match each compound with its corresponding sulfur oxidation state. -sodium sulfate

Match each compound with its corresponding sulfur oxidation state. -sulfur dioxide

Identify the element that was oxidized. 3 P + 5 HNO₃ + 2 H₂O → 5 NO + 3 H₃PO₄

Which of the following elements may not have an oxidation number of -1?

Identify the reduced species in the following chemical process (a lead storage battery). Pb + PbO₂ + 2H+ + 2HSO₄- → 2PbSO₄ + 2H₂O.

More active metals lose electrons to ions of less active metals.

The oxidation state of oxygen gas is ________.

Match each compound with its corresponding sulfur oxidation state. -sulfur, S8

Consult the EMF activity series and predict which of the following changes will occur if an 24K gold ring (pure gold) is placed in an aqueous solution containing hydrochloric acid.

Match each element with its most likely oxidation state. -arsenic

Match each compound with its corresponding chlorine oxidation state. -sodium chloride

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

Ca^₂+, K+ and Cl- have the same number of electrons.

Assign oxidation states to each of the atoms in the following chemical species: a) SiO₂ b) NO- c) TlCl d) V₂O₅