Question 1

Write the net redox reaction that occurs in the following galvanic cell. Ti(s) ∣ Ti3+(aq) || Se2-(aq) ∣ Se(s)

Accepted Answer

A)  Ti(s) + Se2-(aq) + 1 e- → Ti3+(aq) + Se(s) 
B)  2 Ti(s) + 3 Se(s) → 2 Ti3+(aq) + 3 Se2-(aq) 
C)  Ti(s) + Se(s) → Ti3+(aq) + Se2-(aq) + 1 e- 
D)  2 Ti3+(aq) + 3 Se(s) → 2 Ti(s) + 3 Se2-(aq) 
E)  2 Ti3+(aq) + 3 Se(s) + 1 e- → 2 Ti(s) + 3 Se2-(aq) 
A)  Ti(s) + Se2-(aq) + 1 e- → Ti3+(aq) + Se(s) 
B)  2 Ti(s) + 3 Se(s) → 2 Ti3+(aq) + 3 Se2-(aq) 
C)  Ti(s) + Se(s) → Ti3+(aq) + Se2-(aq) + 1 e- 
D)  2 Ti3+(aq) + 3 Se(s) → 2 Ti(s) + 3 Se2-(aq) 
E)  2 Ti3+(aq) + 3 Se(s) + 1 e- → 2 Ti(s) + 3 Se2-(aq)

Question 2

Choose the correct statement based on the following oxidation potentials. Mg/Mg2+ +2.37 v Fe/Fe2+ +0.44 v Cu/Cu2+ -0.34 v
Zn/Zn2+ +0.76 v Sn/Sn2+ +0.14 v Ag/Ag+ -0.80 v

Accepted Answer

A)  Mg will not displace Zn2+ from solution 
B)  Cu will displace Sn2+ from solution 
C)  Fe will displace Zn2+ from solution 
D)  Fe will displace H+ from solution 
A)  Mg will not displace Zn2+ from solution 
B)  Cu will displace Sn2+ from solution 
C)  Fe will displace Zn2+ from solution 
D)  Fe will displace H+ from solution

Question 3

What is Ecell at 25°C of the spontaneous cell made from the Zn2+/Zn (0.76 V) and Br2(l)/Br- (1.07 V) half cells if [Zn2+] = 10-2 and [Br-] = 10-4?

Accepted Answer

A)  0.40 V 
B)  0.13 V 
C)  0.61 V 
D)  0.01 V 
E)  0.49 V 
A)  0.40 V 
B)  0.13 V 
C)  0.61 V 
D)  0.01 V 
E)  0.49 V

Write the net redox reaction that occurs in the following galvanic cell. Ti(s) ∣ Ti³⁺(aq) || Se^2-(aq) ∣ Se(s)

Choose the correct statement based on the following oxidation potentials. Mg/Mg²⁺ +2.37 v Fe/Fe²⁺ +0.44 v Cu/Cu²⁺ -0.34 v Zn/Zn²⁺ +0.76 v Sn/Sn²⁺ +0.14 v Ag/Ag⁺ -0.80 v

What is Ecell at 25°C of the spontaneous cell made from the Zn²⁺/Zn (0.76 V) and Br₂(l)/Br- (1.07 V) half cells if [Zn²⁺] = 10^-² and [Br-] = 10^-4?

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

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

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

Exam 20: Electrochemistry