Multiple Choice
Given the following standard reduction potentials,
Hg22+(aq) + 2 e– 2 Hg (l) E° = +0.789 V
Hg2Cl2(s) + 2 e– 2 Hg (l) + 2 Cl-(aq) E° = +0.271 V
determine Ksp for Hg2Cl2(s) at 25 °C.
20. Electrochemistry
Galvanic Cell
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is false about a Voltaic cell?
A
Anode electrode dissolves while cathode electrode plates out.
B
It changes chemical energy into electrical energy.
C
Anode half-cell accumulates positive charge and cathode half-cell accumulates negative charge.
D
Half reaction with more negative reduction potential attracts electrons and undergoes reduction.
Verified step by step guidance1
Understand the basic function of a Voltaic cell: A Voltaic cell, also known as a galvanic cell, converts chemical energy into electrical energy through spontaneous redox reactions.
Identify the roles of the anode and cathode: In a Voltaic cell, the anode is where oxidation occurs, and the cathode is where reduction occurs. The anode typically loses mass as it dissolves, while the cathode gains mass as ions plate onto it.
Clarify the charge accumulation: In a Voltaic cell, the anode half-cell accumulates positive charge due to the loss of electrons, while the cathode half-cell accumulates negative charge as it gains electrons.
Examine reduction potentials: Reduction potential is a measure of the tendency of a chemical species to acquire electrons and be reduced. The half-reaction with a more positive reduction potential is more likely to undergo reduction, not the one with a more negative reduction potential.
Evaluate the false statement: The statement 'Half reaction with more negative reduction potential attracts electrons and undergoes reduction' is false because it contradicts the principle that the half-reaction with a more positive reduction potential undergoes reduction.
Related Videos
Related Practice
