Sunday, June 10, 2018

electricity - How can a salt solution conduct electrical current?


How does a sodium chloride solution conduct electricity?


I know that sodium chloride dissociates into sodium and chloride ions in water, so when a voltage is applied, those ions can move. However, if I have two poles of metal placed in a beaker and put a voltage between them, the current flowing in the metal is made of electrons, while the current flowing in the water is made of ions. How can one turn into the other?





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