Exploring Electrochemistry Concepts

What is electrochemistry?

• Electrochemistry is the analysis of light and its interaction with matter.

• Electrochemistry is the study of the relationship between electricity and chemical reactions.

• Electrochemistry focuses on the behavior of gases in chemical reactions.

• Electrochemistry is the study of sound waves and their effects on materials.

Define oxidation and reduction in electrochemical terms.

• Oxidation is the loss of mass; reduction is the gain of mass.

• Oxidation is the gain of protons; reduction is the loss of protons.

• Oxidation and reduction are both processes that involve the transfer of heat.

• Oxidation is the loss of electrons; reduction is the gain of electrons.

What is the role of an electrolyte in an electrochemical cell?

• The role of an electrolyte in an electrochemical cell is to conduct ions and enable the flow of electric current.

• To store energy for later use

• To provide structural support to the cell

• To act as a barrier preventing ion flow

Explain the difference between galvanic and electrolytic cells.

• Galvanic cells require energy to operate; electrolytic cells produce energy from spontaneous reactions.

• Galvanic cells are used in electroplating; electrolytic cells are used in batteries.

• Galvanic cells can only operate in acidic solutions; electrolytic cells can operate in any solution.

• Galvanic cells produce energy from spontaneous reactions; electrolytic cells require energy to drive non-spontaneous reactions.

What is the Nernst equation used for in electrochemistry?

• The Nernst equation is used to calculate the cell potential of an electrochemical cell based on the concentrations of reactants and products.

• To calculate the mass of reactants in a reaction.

• To measure the conductivity of a solution.

• To determine the temperature of an electrochemical reaction.

Describe the process of electrolysis.

• Electrolysis is a method of heating substances to high temperatures.

• Electrolysis is the process of using electrical energy to drive a chemical reaction, typically involving the decomposition of an electrolyte.

• Electrolysis involves mixing chemicals to create a reaction without electricity.

• Electrolysis is the process of using light energy to decompose water.

What are standard electrode potentials?

• Standard electrode potentials are the pressures exerted by gases in a reaction.

• Standard electrode potentials measure the mass of a substance in a reaction.

• Standard electrode potentials are the voltages associated with half-reactions at standard conditions, indicating the tendency of a species to gain electrons.

• Standard electrode potentials are the temperatures at which reactions occur.

How does a concentration cell operate?

• A concentration cell generates electricity from the difference in concentration of the same electrolyte in two half-cells.

• A concentration cell operates by using different metals in each half-cell.

• A concentration cell generates heat from the same electrolyte in two half-cells.

• A concentration cell functions by mixing two different electrolytes in one half-cell.

What is Faraday's law of electrolysis?

• The amount of substance produced during electrolysis is proportional to the electric charge passed.

• The electric charge has no effect on the amount of substance produced.

• Electrolysis occurs only at high temperatures regardless of charge.

• The amount of substance is inversely proportional to the electric charge.

Explain the significance of the salt bridge in a galvanic cell.

• The salt bridge is only used for aesthetic purposes in a galvanic cell.

• The salt bridge generates electricity by itself.

• The salt bridge maintains electrical neutrality and allows ion flow, enabling continuous redox reactions in a galvanic cell.

• The salt bridge prevents any ion movement between the half-cells.