Why things conduct electricity
3 marks · EasyWater is added to solid lithium chloride until it dissolves.
Predict whether lithium chloride solution conducts electricity.
Explain why your answer is correct in terms of particle movement.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) Yes
(b) In aqueous solution, lithium chloride separates into ions that are free to move and carry charge, allowing the solution to conduct electricity.
Show mark scheme and worked solution
Marking points
A1 (a) · 1 mark · Yes (solution conducts electricity).
M1 (b) · 1 mark · States that ions are present or form in solution.
A2 (b) · 1 mark · Mentions ions are free to move and carry charge.
Worked solution
a. Yes, lithium chloride solution conducts electricity.
b. When dissolved, lithium chloride dissociates into ions that are free to move, so the solution conducts electricity.