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Hi guys. Say when you are dissolve an ionic compound in water, and apply an electrical current through the solution, the ions in the solution can carry the charge and and make the solution conduct electricity.
But what does carry the current actually mean.

also on a side question, does a solution of sugar, C12H22O11, conduct electricity. Explain your answer

I know that sugar is a covalent substance and not an ionic substance.
Some help will be greatly appreciated. Thanks.
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Metanoia
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The blue line represents the wires, where the electron flow in a clockwise direction. However, electrons cannot move into the solution below.

The solution contains positive and negative ions.
At the cathode (black electrode), a positive ion picks up electrons.
At the anode (red electrode), the negative ion deposits electrons.

So it is like two piers with ships picking up passengers who can't swim on one side and letting others disembark on the other side.

This helps to complete the circuit and allow the electricity to flow.

Sugar will dissolve to form separate sugar molecules, they are uncharged and so we will not expect a sugar solution to conduct electricity.

This video might help with further explanations.
https://www.youtube.com/watch?v=UHYWIM8AbPE
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