Question 1

The reaction of potassium metal and which one of the following ions could be used to produce the most electrical current, per mole of potassium? Hint: Look at the activity series.

Accepted Answer

A) Ag+ 
B) H+ 
C) Mn+ 
D) Sr2+ 
E) Rb+

Question 2

What is the oxidation number of carbon in K2C2O4?

Accepted Answer

A) 0 
B) -4 
C) +3 
D) +4 
E) +6

Question 3

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs Which reaction below does not occur spontaneously upon mixing the reagents shown?

Accepted Answer

A) Cd(s)+ Al3+(aq)$\rarr$Cd2+(aq)+ Al(s) 
B) Cd(s)+ Cu2+(aq)$\rarr$ Cd2+(aq)+ Cu(s) 
C) Zn(s)+ Cu2+(aq)$\rarr$ Zn2+(aq)+ Cu(s) 
D) Al(s)+ Ag+(aq)$\rarr$ Al3+(aq)+ Ag(s) 
E) Cu(s)+ Au3+(aq)$\rarr$ Cu2+(aq)+ Au(s)

Question 4

The least reactive metals are those of

Accepted Answer

A) Group IA (Group 1) 
B) Group IIA (Group 2) 
C) Group IIIA (Group 13) 
D) Group IB (Group 11) 
E) Group IIB (Group 12)

Question 5

The oxidation number of S in S₂O₃^2- is ________.

Accepted Answer

The answer of The oxidation number of S in S₂O₃^2-...

Question 6

What is the oxidation number of boron in Na2B4O7?

Accepted Answer

A) -3 
B) +1 
C) +5 
D) +3 
E) +6

Question 7

What is the change in the oxidation number of iodine in the following?
 KI $\rarr$ KIO3

Accepted Answer

A) decrease by three units 
B) decrease by four units 
C) increase by six units 
D) increase by five units 
E) increase by four units

Question 8

When a metal reacts with oxygen gas, which substance is the reducing agent?

Accepted Answer

The answer of When a metal reacts with oxygen gas,...

Question 9

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs Based on this list, which element below would react most readily with a 0.10 M aqueous solution of hydrochloric acid?

Accepted Answer

A) Au 
B) Sn 
C) Cu 
D) Al 
E) Mg

Question 10

In a series of chemical test reactions, the following observations were made when several metallic element samples were treated with 3.00 M hydrochloric acid solution. Zn: metal dissolves, hydrogen gas is emitted. Cu: no reaction. Ag: no reaction. Mg: metal dissolves, hydrogen gas is emitted. Mn: metal dissolves, hydrogen gas is emitted. Which statement below is true?

Accepted Answer

A) Mg, Mn, Zn are more reactive than Ag, Cu; but less reactive than H2. 
B) Mg, Mn, Zn are less reactive than Ag, Cu; but more reactive than H2. 
C) Mg, Mn, Zn are more reactive than Ag, Cu, and H2. 
D) Mg, Mn, Zn are less reactive than Ag, Cu, and H2. 
E) These observations are insufficient to form any judgment about relative reactivity of any of the elements tested.

Question 11

Hydrogen peroxide, H2O2, is a powerful oxidizing agent, which has many medical and industrial uses.

Accepted Answer

A) True 
 B)False

Question 12

After balancing the following equation for the reaction in basic media, 
OH- + Bi2O3(s)+ OCl-(aq)$\rarr$ Cl-(aq)+ BiO3-(aq)+ H2O what is the sum of ALL the coefficients in the equation? (Remember to include values of 1 in your summation.)Hint: Start by balancing each half-reaction.

Accepted Answer

A) 6 
B) 8 
C) 9 
D) 10 
E) 14

Question 13

After balancing the following equation for the reaction in acidic media,
MnO4-(aq)+ H2C2O4(aq)+ H+(aq)$\rarr$ Mn2+(aq)+ CO2(g)+ H2O(l)what is the sum of ALL the coefficients in the equation?(Remember to include values of 1 in your summation.)Hint: Start by balancing each half-reaction.

Accepted Answer

A) 29 
B) 30 
C) 31 
D) 32 
E) 33

Question 14

Is the following, PbO₂ → PbO, an oxidation or a reduction half-reaction?

Accepted Answer

The answer of Is the following, PbO₂ → PbO, an...

Question 15

A partial activity series is: Au < Pt < Ag < Cu < H₂ < Sn < Co < Fe < Mg. List the metals in this partial series that would react with a solution of Sn²⁺ ions.

Accepted Answer

The answer of A partial activity series is: Au <...

Question 16

What is the oxidation number of sulfur in the S2O82 ion?

Accepted Answer

A) -2 
B) +1 
C) +3 
D) +5 
E) +7

Question 17

The oxidation number of V in VOCl₃ is ________.

Accepted Answer

The answer of The oxidation number of V in VOCl₃...

Question 18

A partial activity series of metals is: Au < Ag < Cu < Pb < Sn. Which metal is most easily oxidized: Au, Pb, Ag?

Accepted Answer

The answer of A partial activity series of metals is:...

Question 19

Which of the following involves reduction?

Accepted Answer

A) Ca2+(aq)+ CO32-(aq)$\rarr$CaCO3(s) 
B) 2 H+(aq)+ SO32-(aq)$\rarr$ H2O(l)+ SO2(g) 
C) VO43-(aq)$\rarr$ VO2+(aq) 
D) CrO2- (aq)$\rarr$CrO42-(aq) 
E) 2 S2O72-(aq)+ H2O(l)$\rarr$ 2 SO42-(aq)+ 2 H+(aq)

Question 20

What is the oxidation number of sodium in Na2O2?

Accepted Answer

A) -2 
B) -1 
C) +1 
D) +2 
E) +4

Exam 6: Oxidation-Reduction Reactions

The reaction of potassium metal and which one of the following ions could be used to produce the most electrical current, per mole of potassium? Hint: Look at the activity series.

What is the oxidation number of carbon in K₂C₂O₄?

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs Which reaction below does not occur spontaneously upon mixing the reagents shown?

The least reactive metals are those of

The oxidation number of S in S₂O₃^2- is ________.

What is the oxidation number of boron in Na₂B₄O₇?

What is the change in the oxidation number of iodine in the following? KI $\rarr$ KIO₃

When a metal reacts with oxygen gas, which substance is the reducing agent?

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs Based on this list, which element below would react most readily with a 0.10 M aqueous solution of hydrochloric acid?

Hydrogen peroxide, H₂O₂, is a powerful oxidizing agent, which has many medical and industrial uses.

After balancing the following equation for the reaction in basic media, OH^- + Bi₂O₃(s) + OCl^-(aq) $\rarr$ Cl^-(aq) + BiO₃^-(aq) + H₂O what is the sum of ALL the coefficients in the equation? (Remember to include values of 1 in your summation.) Hint: Start by balancing each half-reaction.

Is the following, PbO₂ → PbO, an oxidation or a reduction half-reaction?

A partial activity series is: Au < Pt < Ag < Cu < H₂ < Sn < Co < Fe < Mg. List the metals in this partial series that would react with a solution of Sn²⁺ ions.

What is the oxidation number of sulfur in the S₂O₈² ion?

The oxidation number of V in VOCl₃ is ________.

A partial activity series of metals is: Au < Ag < Cu < Pb < Sn. Which metal is most easily oxidized: Au, Pb, Ag?

Which of the following involves reduction?

What is the oxidation number of sodium in Na₂O₂?

Exam 6: Oxidation-Reduction Reactions

The reaction of potassium metal and which one of the following ions could be used to produce the most electrical current, per mole of potassium? Hint: Look at the activity series.

What is the oxidation number of carbon in K2C2O4?

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs Which reaction below does not occur spontaneously upon mixing the reagents shown?

The least reactive metals are those of

The oxidation number of S in S2O32- is ________.

What is the oxidation number of boron in Na2B4O7?

What is the change in the oxidation number of iodine in the following? KI →\rarr→ KIO3

When a metal reacts with oxygen gas, which substance is the reducing agent?

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs Based on this list, which element below would react most readily with a 0.10 M aqueous solution of hydrochloric acid?

Hydrogen peroxide, H2O2, is a powerful oxidizing agent, which has many medical and industrial uses.

After balancing the following equation for the reaction in basic media, OH- + Bi2O3(s) + OCl-(aq) →\rarr→ Cl-(aq) + BiO3-(aq) + H2O what is the sum of ALL the coefficients in the equation? (Remember to include values of 1 in your summation.) Hint: Start by balancing each half-reaction.

After balancing the following equation for the reaction in acidic media, MnO4-(aq) + H2C2O4(aq) + H+(aq) →\rarr→ Mn2+(aq) + CO2(g) + H2O(l) what is the sum of ALL the coefficients in the equation?(Remember to include values of 1 in your summation.) Hint: Start by balancing each half-reaction.

Is the following, PbO2 → PbO, an oxidation or a reduction half-reaction?

A partial activity series is: Au < Pt < Ag < Cu < H2 < Sn < Co < Fe < Mg. List the metals in this partial series that would react with a solution of Sn2+ ions.

What is the oxidation number of sulfur in the S2O82 ion?

The oxidation number of V in VOCl3 is ________.

A partial activity series of metals is: Au < Ag < Cu < Pb < Sn. Which metal is most easily oxidized: Au, Pb, Ag?

Which of the following involves reduction?

What is the oxidation number of sodium in Na2O2?

What is the oxidation number of carbon in K₂C₂O₄?

The oxidation number of S in S₂O₃^2- is ________.

What is the oxidation number of boron in Na₂B₄O₇?

What is the change in the oxidation number of iodine in the following? KI $\rarr$ KIO₃

Hydrogen peroxide, H₂O₂, is a powerful oxidizing agent, which has many medical and industrial uses.

After balancing the following equation for the reaction in basic media, OH^- + Bi₂O₃(s) + OCl^-(aq) $\rarr$ Cl^-(aq) + BiO₃^-(aq) + H₂O what is the sum of ALL the coefficients in the equation? (Remember to include values of 1 in your summation.) Hint: Start by balancing each half-reaction.

Is the following, PbO₂ → PbO, an oxidation or a reduction half-reaction?

A partial activity series is: Au < Pt < Ag < Cu < H₂ < Sn < Co < Fe < Mg. List the metals in this partial series that would react with a solution of Sn²⁺ ions.

What is the oxidation number of sulfur in the S₂O₈² ion?

The oxidation number of V in VOCl₃ is ________.

What is the oxidation number of sodium in Na₂O₂?