Electrochemistry Concepts and Calculations

This video tutorial covers various aspects of electrochemistry, including identifying true and false statements about electrochemical cells, sketching and analyzing galvanic cells, calculating Gibbs free energy, and understanding the relationship between equilibrium constants and cell potentials. It also demonstrates the application of the Nernst equation under non-standard conditions and provides calculations for electroplating processes.

Which statement about oxidation and reduction is correct?

• Oxidation involves a gain of electrons.

• Reduction involves a loss of electrons.

• Reduction occurs at the cathode.

• Oxidation occurs at the cathode.

In a galvanic cell, which direction do electrons flow?

• From cathode to anode

• From anode to cathode

• From negative to positive terminal

• From positive to negative terminal

What is the role of the salt bridge in a galvanic cell?

• To increase cell potential

• To generate electricity

• To maintain charge balance

• To separate the anode and cathode

How is the standard cell potential calculated?

• By adding the potentials of the anode and cathode

• By subtracting the anode potential from the cathode potential

• By multiplying the potentials of the anode and cathode

• By dividing the cathode potential by the anode potential

What does a positive cell potential indicate about a reaction?

• The reaction is non-spontaneous

• The reaction is at equilibrium

• The reaction is spontaneous

• The reaction has a negative Gibbs free energy

How is Gibbs free energy related to cell potential?

• It is equal to the cell potential

• It is inversely proportional to cell potential

• It is unrelated to cell potential

• It is directly proportional to cell potential

What is the equilibrium constant (K) when the cell potential is zero?

• K is less than 1

• K is greater than 1

• K is negative

• K is equal to 1

What is the primary factor affecting the mass of metal plated during electroplating?

• The concentration of the solution

• The current applied

• The type of metal used

• The duration of electroplating

How is the amount of current required for electroplating calculated?

• By multiplying the mass of metal by the charge

• By dividing the charge by the time

• By multiplying the charge by the time

• By dividing the mass of metal by the time

What is the unit of charge used in electroplating calculations?

• Joule

• Volt

• Coulomb

• Ampere