1.51 Describe experiments to distinguish between electrolytes and non-electrolytes

• Set up a circuit with an LED light, a battery/power pack, wire and a solution
• Create a gap between the two ends of the wire. Place them in the solution.
• Switch the power pack on (if required)
• If LED lights up, a current is flowing through the molten substance / solution. This means it is an electrolyte.
• If it doesn't light up, there's no current, therefore it is not an electrolyte.

Or you could just...