IG Chemistry-6 Electrochemistry (6.3)

Front

What is electrochemistry?

Back

Electrochemistry is the branch of chemistry that deals with the relationship between electrical energy and chemical reactions.

Front

What is a fuel cell?

Back

A fuel cell is an electrochemical cell that converts the chemical energy of a fuel (usually hydrogen) and an oxidant (usually oxygen) into electricity, with water and heat as byproducts.

Front

What is the main advantage of hydrogen as a fuel?

Back

The main advantage of hydrogen as a fuel is that it produces only water when burned or used in a fuel cell, making it a clean energy source.

Front

What is the process of electrolysis?

Back

Electrolysis is a chemical process that uses electricity to drive a non-spontaneous reaction, often used to decompose compounds into their elements.

Front

What is produced at the cathode during electrolysis of dilute hydrochloric acid?

Back

Hydrogen gas is produced at the cathode during the electrolysis of dilute hydrochloric acid.

Front

What is the half-equation for the discharge of hydrogen ions?

Back

2H⁺ + 2e^- → H₂.

Front

What is the role of the anode in a fuel cell?

Back

In a fuel cell, the anode is where the oxidation reaction occurs, typically involving the loss of electrons from hydrogen.

Front

What is the role of the cathode in a fuel cell?

Back

In a fuel cell, the cathode is where the reduction reaction occurs, typically involving the gain of electrons by oxygen.

Front

What is the main reason hydrogen is more difficult to store than diesel?

Back

Hydrogen is a gas which needs to be stored under pressure while diesel is liquid.

Front

What gas is produced at the anode during the electrolysis of very dilute hydrochloric acid?

Back

Oxygen gas is produced at the anode during the electrolysis of very dilute hydrochloric acid.