Concepts Quiz: Electrochemistry: How do we transport energy?

Electrochemistry is the area of chemistry concerned with the inter-conversion of ______ and ______ energies

• Mechanical, Chemical

• Chemical, Electrical

• Electrical, Mechanical

• Chemical, Electrochemical

Electrochemical cells require charge carriers: (1) two electrodes which are ____ carriers and (2) an electrolyte which is an ____ carrier

• Hole, Electron

• Ion, Electron

• Electron, Ion

• Electron, Hole

Electrochemical reactions are...

• Homogeneous processes

• Heterogeneous processes

• Spontaneous processes

• Nonspontaneous processes

Three-electrode cells use this electrode to accurately measure and compare the potential

• Working Electrode

• Quasi-stable Electrode

• Reference Electrode

• Counter Electrode

The surface area of the counter electrode must be _____ than the area of the working electrode

• Equal

• Larger

• Smaller

What is a potentiostat? Why do we use it in electrochemistry?

Electrochemical water splitting consists of two reactions:

• Oxygen reduction reaction (ORR)

• Hydrogen evolution reaction (HER)

• Hydrogen oxidation reaction (HOR)

• Oxygen evolution reaction (OER)

Bubble dissipation becomes important at _____ current densities

• High

• Low

A catalyst increases the ______ by decreasing the ______ through a new reaction mechanism

• reaction rate, temperature

• temperature, reaction rate

• reaction rate, activation energy

• activation energy, reaction rate

Draw a potential energy diagram comparing reactions with and without a catalyst