What Is Electrolysis

The video tutorial explains electrolysis, a process where electrical current flows through a conducting liquid or molten compound, causing chemical changes. It uses molten sodium chloride as an example, describing how ions move towards electrodes, leading to chemical reactions. The tutorial also covers the roles of electrodes, the concept of electrolytes, and the movement of electrons in metals. Key terms like cations, anions, anode, and cathode are defined, and the importance of ion concentration and potential difference in electrolysis is highlighted.

What is required for a liquid to conduct electricity?

• It must be a solid ionic compound.

• It must be a pure element.

• It must contain free-moving ions.

• It must be at room temperature.

In the context of electrolysis, what are cations?

• Negatively charged ions

• Electrons

• Positively charged ions

• Neutral particles

What happens to electrons in a metal when a voltage is applied?

• They move towards the negative terminal.

• They become stationary.

• They disappear.

• They move towards the positive terminal.

What is the role of the anode in electrolysis?

• It repels electrons.

• It attracts anions.

• It attracts cations.

• It generates heat.

How can the ion flow rate in an electrolyte be increased?

• By lowering the temperature.

• By decreasing the concentration of the solution.

• By increasing the potential difference across the cell.

• By using a smaller electrode.