Electrochemistry Basics

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What is the primary function of a potentiostat in an electrochemical reaction?

To measure the resulting current
To regulate the energy of the electrons in the electrode (correct)
To initiate the chemical reaction
To control the flow of reactants

What is the y-axis typically labeled as in a cyclic voltammetry graph?

Resulting current (i) (correct)
Time of reaction
Energy of the electrons
Applied potential (E)

What is the difference between a chemical reduction and an electrochemical reduction?

The energy of the electrons involved
The presence of an electrode (correct)
The type of reactant used
The rate of the reaction

What is the purpose of imposing a cyclic voltammetry on an electrochemical system?

To control the electrode potential (B) Signup and view all the answers

What is the significance of the sign convention used in reporting CV data?

It affects the interpretation of the resulting current (D) Signup and view all the answers

What is the difference between homogeneous and heterogeneous reduction of ferrocenium?

The phase of the reactants (D) Signup and view all the answers

What determines the amount of Ox available for reduction in the CrEr mechanism?

The equilibrium constant of the first step (C) Signup and view all the answers

What can be extracted from voltammograms in certain cases?

The equilibrium constant (D) Signup and view all the answers

What is the result of a large equilibrium constant in the CrEr mechanism?

A completely reversible voltammogram (A) Signup and view all the answers

What is the focus of quantitative electrochemical analysis?

Exploring the electron transfer reactions underlying renewable energy technologies (D) Signup and view all the answers

What is the significance of the voltammogram in the CrEr mechanism?

It reflects the reversibility of the reaction, which is influenced by the equilibrium constant (D) Signup and view all the answers

What is the benefit of utilizing electrochemistry in research?

It is a powerful tool for exploring the electron transfer reactions underlying renewable energy technologies (D) Signup and view all the answers

What is the purpose of a reference electrode in an electrochemical cell?

To maintain a constant potential independent of the electrolyte used (D) Signup and view all the answers

What is the advantage of using an AgCl/Ag electrode as a reference electrode?

It eliminates the possibility of silver salts leaks (B) Signup and view all the answers

What is the purpose of the porous frit in an electrochemical cell?

To separate the reference electrode from the solution (C) Signup and view all the answers

Why is it important to match the solvent and electrolyte in the reference compartment to the one used in the experiment?

To minimize junction potentials (B) Signup and view all the answers

What occurs when a potential is applied to the working electrode such that reduction or oxidation of the analyte can occur?

The current flow between the working electrode and the counter electrode increases (B) Signup and view all the answers

What is the purpose of the counter electrode in an electrochemical cell?

To complete the electrical circuit (A) Signup and view all the answers