Question 1

________ - ________ fuel cells provide electrical power and drinking water for space flights.

Accepted Answer

The answer of ________ - ________ fuel cells provide electrical...

Question 2

Which of the following elements can be isolated by electrolysis of the aqueous salt shown?

Accepted Answer

A)  Phosphorus from K3PO4(aq) 
B)  Sodium from NaBr(aq) 
C)  Aluminum from AlCl3(aq) 
D)  Fluorine from KF(aq) 
E)  Iodine from NaI(aq) 
A)  Phosphorus from K3PO4(aq) 
B)  Sodium from NaBr(aq) 
C)  Aluminum from AlCl3(aq) 
D)  Fluorine from KF(aq) 
E)  Iodine from NaI(aq)

Question 3

Which of the following elements could be prepared by electrolysis of the aqueous solution shown?

Accepted Answer

A)  Sodium from Na3PO4(aq) 
B)  Sulfur from K2SO4(aq) 
C)  Oxygen from H2SO4(aq) 
D)  Potassium from KCl(aq) 
E)  Nitrogen from AgNO3(aq) 
A)  Sodium from Na3PO4(aq) 
B)  Sulfur from K2SO4(aq) 
C)  Oxygen from H2SO4(aq) 
D)  Potassium from KCl(aq) 
E)  Nitrogen from AgNO3(aq)

Question 4

What mass of Cu may be deposited from a Cu2+ solution during electrolysis by a current of 3.00 A for 10.0 hours?

Accepted Answer

A)  63.6 g Cu 
B)  35.6 g Cu 
C)  6.4 g Cu 
D)  3.6 g Cu 
E)  71.2 g Cu 
A)  63.6 g Cu 
B)  35.6 g Cu 
C)  6.4 g Cu 
D)  3.6 g Cu 
E)  71.2 g Cu

Question 5

Two cells are connected in series, so that the same current flows through two electrodes, where the following half-reactions occur: Cu2+(aq) + 2e- → Cu(s) and Ag+(aq) + e- → Ag(s)
For every 1.00 g of copper produced in the first process, how many grams of silver will be produced in the second one?

Accepted Answer

A)  0.294 g Ag 
B)  0.588 g Ag 
C)  0.850 g Ag 
D)  1.70 g Ag 
E)  3.40 g Ag 
A)  0.294 g Ag 
B)  0.588 g Ag 
C)  0.850 g Ag 
D)  1.70 g Ag 
E)  3.40 g Ag

Question 6

Which, if any, of the following metals would be capable of acting as a sacrificial anode when used with iron pipe?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 7

Based on the data presented below, which is the strongest oxidizing agent?

Accepted Answer

A)  [PtCl4]2-(aq) 
B)  RuO4(s) 
C)  HFeO4-(aq) 
D)  H4XeO6(aq) 
E)  Cl-(aq) 
A)  [PtCl4]2-(aq) 
B)  RuO4(s) 
C)  HFeO4-(aq) 
D)  H4XeO6(aq) 
E)  Cl-(aq)

Question 8

A voltaic cell prepared using aluminum and nickel has the following cell notation. Al(s) | Al3+(aq) || Ni2+(aq) | Ni(s)
Which reaction occurs at the anode?

Accepted Answer

A)  Al(s) → Al3+(aq) + 3e- 
B)  Al3+(aq) + 3e- → Al(s) 
C)  Ni(s) → Ni2+(aq) + 2e- 
D)  Ni2+(aq) + 2e- → Ni(s) 
E)  Ni(s) + Ni2+(aq) → Al(s) + Al3+(aq) 
A)  Al(s) → Al3+(aq) + 3e- 
B)  Al3+(aq) + 3e- → Al(s) 
C)  Ni(s) → Ni2+(aq) + 2e- 
D)  Ni2+(aq) + 2e- → Ni(s) 
E)  Ni(s) + Ni2+(aq) → Al(s) + Al3+(aq)

Question 9

A galvanic cell is constructed using the two hypothetical half-reactions   a. Calculate the standard potential of this cell, E°cell .
b. Calculate ΔG° for the cell reaction.(1 faraday = 96,500 C)

Accepted Answer

a. 2.00 V

Question 10

What is the oxidizing agent in the (unbalanced) reaction? Cu(s) + H+(aq) + NO3-(aq) → NO(g) + H2O(l) + Cu2+(aq)

Accepted Answer

A)  Cu 
B)  H+ 
C)  (NO3-) 
D)  NO 
E)  Cu2+ 
A)  Cu 
B)  H+ 
C)  (NO3-) 
D)  NO 
E)  Cu2+

Question 11

Aluminum does not corrode in the same manner as iron does, because

Accepted Answer

A)  aluminum does not react with oxygen gas. 
B)  a protective layer of aluminum oxide forms on the metal surface. 
C)  aluminum is harder to oxidize than iron. 
D)  iron gives cathodic protection to aluminum. 
E)  the electrical circuit cannot be completed on an aluminum surface. 
A)  aluminum does not react with oxygen gas. 
B)  a protective layer of aluminum oxide forms on the metal surface. 
C)  aluminum is harder to oxidize than iron. 
D)  iron gives cathodic protection to aluminum. 
E)  the electrical circuit cannot be completed on an aluminum surface.

Question 12

What is E°cell for the following reaction? 2 Ag(s) + Sn2+(aq) → 2 Ag+(aq) + Sn(s)

Accepted Answer

A)  +0.94 V 
B)  -0.94 V 
C)  +0.67 V 
D)  -0.67 V 
E)  +1.34 V 
A)  +0.94 V 
B)  -0.94 V 
C)  +0.67 V 
D)  -0.67 V 
E)  +1.34 V

Question 13

What mass of copper can be deposited by the passage of 12.0 A for 25.0 min through a solution of copper(II) sulfate? [1 C = 1 A•s; F = 96,500 C]

Accepted Answer

A)  5.93 g 
B)  3.95 g 
C)  1.97 g 
D)  11.85 g 
E)  29.6 g 
A)  5.93 g 
B)  3.95 g 
C)  1.97 g 
D)  11.85 g 
E)  29.6 g

Question 14

________ is a process used to coat iron in order to protect it from corrosion.

Accepted Answer

Galvanizat

Question 15

The equilibrium constant for the reaction of Ni2+ with Cd is 1.17 x 105. Calculate the free energy change for the reaction at 25oC.

Accepted Answer

A)  -12.6 kJ 
B)  -28.9 kJ 
C)  2.43 kJ 
D)  28.9 kJ 
E)  12.6 kJ 
A)  -12.6 kJ 
B)  -28.9 kJ 
C)  2.43 kJ 
D)  28.9 kJ 
E)  12.6 kJ

Question 16

Which is the correct cell notation for the following reaction? Au3+(aq) + Al(s) → Al3+(aq) + Au(s)

Accepted Answer

A)  Al3+(aq)|Al(s)||Au3+(aq)|Au(s) 
B)  Al(s)|Al3+(aq)||Au3+(aq)|Au(s) 
C)  Al3+(aq)|Au3+(aq)||Al(s)|Au(s) 
D)  Al3+(aq)|Au(s)||Au3+(aq)|Al(s) 
E)  Au(s)|Al(s)||Au3+(aq)|Al3+(aq) 
A)  Al3+(aq)|Al(s)||Au3+(aq)|Au(s) 
B)  Al(s)|Al3+(aq)||Au3+(aq)|Au(s) 
C)  Al3+(aq)|Au3+(aq)||Al(s)|Au(s) 
D)  Al3+(aq)|Au(s)||Au3+(aq)|Al(s) 
E)  Au(s)|Al(s)||Au3+(aq)|Al3+(aq)

Question 17

Complete and balance the following redox equation. Now sum the coefficients of all species in the balanced equation. (Remember to add the coefficients that are equal to one, and to add the coefficients of any species added to the equation.) The sum of the smallest whole number coefficients is Bi(OH)3 + SnO22- → Bi + SnO32- (basic solution)

Accepted Answer

A)  32 
B)  25 
C)  16 
D)  13 
E)  4 
A)  32 
B)  25 
C)  16 
D)  13 
E)  4

Question 18

What is the name given to the apparatus where reduction occurs in a cell where electricity flows?

Accepted Answer

A)  Cathode 
B)  Electrode 
C)  Galvanic cell 
D)  Anode 
E)  Voltaic cell 
A)  Cathode 
B)  Electrode 
C)  Galvanic cell 
D)  Anode 
E)  Voltaic cell

Question 19

When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient of Sn(OH)3-? Bi(OH)3(s) + Sn(OH)3-(aq) → Sn(OH)62-(aq) + Bi(s) (basic solution)

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  6 
E)  12 
A)  1 
B)  2 
C)  3 
D)  6 
E)  12

Question 20

What is the name given to the apparatus that connects the two solutions by a conducting medium through which the cations and anions can move from one half-cell to the other?

Accepted Answer

A)  Cathode 
B)  Electrode 
C)  Galvanic cell 
D)  Salt bridge 
E)  Fuel cell 
A)  Cathode 
B)  Electrode 
C)  Galvanic cell 
D)  Salt bridge 
E)  Fuel cell

Exam 19: Electrochemistry

________ - ________ fuel cells provide electrical power and drinking water for space flights.

Which of the following elements can be isolated by electrolysis of the aqueous salt shown?

Which of the following elements could be prepared by electrolysis of the aqueous solution shown?

What mass of Cu may be deposited from a Cu2+ solution during electrolysis by a current of 3.00 A for 10.0 hours?

Which, if any, of the following metals would be capable of acting as a sacrificial anode when used with iron pipe?

Based on the data presented below, which is the strongest oxidizing agent?

A voltaic cell prepared using aluminum and nickel has the following cell notation. Al(s) | Al3+(aq) || Ni2+(aq) | Ni(s) Which reaction occurs at the anode?

A galvanic cell is constructed using the two hypothetical half-reactions a. Calculate the standard potential of this cell, E°cell . b. Calculate ΔG° for the cell reaction.(1 faraday = 96,500 C)

What is the oxidizing agent in the (unbalanced) reaction? Cu(s) + H+(aq) + NO3-(aq) → NO(g) + H2O(l) + Cu2+(aq)

Aluminum does not corrode in the same manner as iron does, because

What is E°cell for the following reaction? 2 Ag(s) + Sn2+(aq) → 2 Ag+(aq) + Sn(s)

What mass of copper can be deposited by the passage of 12.0 A for 25.0 min through a solution of copper(II) sulfate? [1 C = 1 A•s; F = 96,500 C]

________ is a process used to coat iron in order to protect it from corrosion.

The equilibrium constant for the reaction of Ni2+ with Cd is 1.17 x 105. Calculate the free energy change for the reaction at 25oC.

Which is the correct cell notation for the following reaction? Au3+(aq) + Al(s) → Al3+(aq) + Au(s)

What is the name given to the apparatus where reduction occurs in a cell where electricity flows?

When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient of Sn(OH)3-? Bi(OH)3(s) + Sn(OH)3-(aq) → Sn(OH)62-(aq) + Bi(s) (basic solution)

What is the name given to the apparatus that connects the two solutions by a conducting medium through which the cations and anions can move from one half-cell to the other?

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

- fuel cells provide electrical power and drinking water for space flights.

What mass of Cu may be deposited from a Cu²⁺ solution during electrolysis by a current of 3.00 A for 10.0 hours?

A voltaic cell prepared using aluminum and nickel has the following cell notation. Al(s) | Al³⁺(aq) || Ni²⁺(aq) | Ni(s) Which reaction occurs at the anode?

A galvanic cell is constructed using the two hypothetical half-reactions a. Calculate the standard potential of this cell, E°_{cell .} b. Calculate ΔG° for the cell reaction.(1 faraday = 96,500 C)

What is the oxidizing agent in the (unbalanced) reaction? Cu(s) + H⁺(aq) + NO₃^-(aq) → NO(g) + H₂O(l) + Cu²⁺(aq)

What is E°_cell for the following reaction? 2 Ag(s) + Sn²⁺(aq) → 2 Ag⁺(aq) + Sn(s)

The equilibrium constant for the reaction of Ni²⁺ with Cd is 1.17 x 10⁵. Calculate the free energy change for the reaction at 25^oC.

Which is the correct cell notation for the following reaction? Au³⁺(aq) + Al(s) → Al³⁺(aq) + Au(s)

When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient of Sn(OH)₃^-? Bi(OH)₃(s) + Sn(OH)₃^-(aq) → Sn(OH)₆^2-(aq) + Bi(s) (basic solution)