Question

The passage of electricity through an electrolyte solution is caused by the movement of (a) electrons only, (b) cations only, (c) anions only, (d) both cations and anions.

Short answer

The passage of electricity through an electrolyte solution is caused by the movement of both cations and anions

Step-by-step solution

Understanding electrolyte solution

An electrolyte solution is a solution that conducts electricity. It contains dissolved ions. These ions are cations (positively charged ions) and anions (negatively charged ions). Electrolyte solutions can conduct electricity because of the movement of these ions.

Identifying key concepts

In the process of electrolysis, an electric current is passed through the electrolyte solution. This causes the cations and anions to move towards the electrodes of opposite charge. The cations move towards the cathode (negative electrode) and the anions move towards the anode (positive electrode). Thus, it is the movement of both cations and anions that allows for the passage of electricity through an electrolyte solution.

Answering the question

Given this information, it can be concluded that the statement (d) 'both cations and anions' is correct. That is, the passage of electricity through an electrolyte solution is caused by the movement of both cations and anions.