A question about the electrolysis of water
As the topic, when we want to do electrolysis on water, we must add something into the water to increase the electricity conductivity of the water, so as to increase the rate of reaction.
Sometimes, we will add acid into the water. This is easy to understand. There is more H+ ions and the concentration is higher.
However, when we get NaCl into the water to make the water into dilute NaCl solution, the situation is totally different. There is Na+ and Cl- ions added into the water only, where both of them will not take part in the reaction. Then, why the electircity conductivity of the water will be increase? Why the rate of the reaction will be increase?