Electrochemistry Concepts and Applications

The video explores electrochemical cells, focusing on energy flow, standard electrode potentials, and cell potentials. It explains how to calculate these potentials and their role in determining reaction spontaneity. The video provides examples, such as the zinc-copper cell, and discusses applications like electrolysis and electroplating. It also covers Gibbs free energy and its relation to work in electrochemical processes.

What is the natural tendency of electrons in an electrochemical cell?

• To flow from high to low potential energy

• To remain stationary

• To flow from low to high potential energy

• To flow in a circular motion

What is the reference point used to measure potential differences in electrochemical cells?

• Silver half-cell

• Copper half-cell

• Zinc half-cell

• Hydrogen half-cell

What does a positive standard electrode potential indicate about a substance?

• It is non-reactive

• It is neutral

• It is more likely to gain electrons

• It is more likely to lose electrons

How is the standard cell potential (E cell) calculated?

• By adding the potentials of the anode and cathode

• By multiplying the potentials of the anode and cathode

• By subtracting the anode potential from the cathode potential

• By dividing the cathode potential by the anode potential

What does a negative E cell indicate about a reaction?

• The reaction is at equilibrium

• The reaction is spontaneous

• The reaction is non-spontaneous

• The reaction is exothermic

In a zinc-copper electrochemical cell, which metal acts as the anode?

• Copper

• Silver

• Iron

• Zinc

What happens to the standard electrode potential when a half-reaction is flipped?

• It remains the same

• It becomes zero

• It doubles

• It flips sign

What is the purpose of electrolysis in industrial applications?

• To increase temperature

• To drive non-spontaneous reactions

• To decrease pressure

• To create spontaneous reactions

In electroplating, what role does the object to be coated play?

• Neutral

• Electrolyte

• Anode

• Cathode

Which of the following is a common application of electroplating?

• Purifying water

• Creating alloys

• Coating jewelry

• Producing electricity