What is the oxidation number of carbon in K2C2O4?

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

What is the oxidation number of boron in Na2B4O7?

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

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.

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

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.

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

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

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

What is the oxidation number of sodium in Na2O2?

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

(Multiple Choice)

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Question 101

What is the oxidation number of carbon in K₂C₂O₄?

(Multiple Choice)

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Question 102

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?

(Multiple Choice)

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Question 103

The least reactive metals are those of

(Multiple Choice)

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Question 104

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

(Short Answer)

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Question 105

What is the oxidation number of boron in Na₂B₄O₇?

(Multiple Choice)

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Question 106

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

(Multiple Choice)

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Question 107

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

(Short Answer)

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Question 108

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?

(Multiple Choice)

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Question 109

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?

(Multiple Choice)

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Question 110

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

(True/False)

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Question 111

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.

(Multiple Choice)

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Question 112

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.

(Multiple Choice)

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Question 113

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

(Short Answer)

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Question 114

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.

(Short Answer)

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Question 115

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

(Multiple Choice)

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Question 116

The oxidation number of V in VOCl₃ is ________.

(Short Answer)

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Question 117

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

(Short Answer)

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Question 118

Which of the following involves reduction?

(Multiple Choice)

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Question 119

What is the oxidation number of sodium in Na₂O₂?

(Multiple Choice)

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Question 120

Showing 101 - 120 of 175

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?

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

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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?