how does current flow through liquids?

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ndnordic | High School Teacher | (Level 2) Associate Educator

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For a current to flow through a liquid, there has to be some substance dissolved in the liquid that can ionize in solution. The ions formed can then carry the current from one electrode to another. An example if this is dissolving salt in water. Water by itself is not a conductor but because the salt ionizes when dissolves the salt water will carry a current.