Chemistry 2006 JAMB Past Questions - Question 45: The solution that will conduct the highest amount of electricity is

Correct Answer

B

Explanation

The electrical conductivity of a solution depends on the concentration of ions in the solution. In general, strong acids dissociate completely into ions in solution, resulting in higher electrical conductivity compared to weak acids.

Hydrochloric acid (HCl) is a strong acid, and when it dissociates in water, it forms a high concentration of ions. Therefore, between the options provided, the solution with 2.0 mol dm⁻³ of hydrochloric acid is likely to conduct the highest amount of electricity.

On the other hand, ethanoic acid (CH₃COOH) is a weak acid that only partially dissociates in water, resulting in a lower concentration of ions. So, between the options for ethanoic acid solutions, the 2.0 mol dm⁻³ concentration is expected to conduct more electricity than the 0.5 mol dm⁻³ concentration.

In summary, the order from highest to lowest electrical conductivity would be:

1. 2.0 mol dm⁻³ of hydrochloric acid
2. 2.0 mol dm⁻³ of ethanoic acid
3. 0.5 mol dm⁻³ of hydrochloric acid
4. 0.5 mol dm⁻³ of ethanoic acid