Water and acid?

Why does water turn into a good conductor on adding an acid to it?

Answer:
Water self ionizes:

H2O(l) <--> H+(aq) + OH-(aq)

which is why is a conductor in the first place. But it is poor since H+ ≈ OH-

when you add H+ to the system H+ >> OH-

and the system can then conduct, because it is truely ionic.
There are more negative electrons in the water after adding acid so it conducts better
what you need to conduct electricity is the ability for electrons to move. adding the acid results in the dissociation of the ions in the acid, these charged ions are then able to carry electrons throughout the solution and thus carry electricity
Simple, the greater the ionic concentration, the greater your conductance. An acid is by definition, something that will generate H+ ions in a solution of water.

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