✅ Answers
Pure water is not a good conductor of electricity. Ordinary distilled water in equilibrium with carbon dioxide of the air has a conductivity of about x ^- W-*m^- ( dS/m). Because the electrical current is transported by the ions in solution, the conductivity increases as the concentration of ions increases.
Read more: http://www.lenntech.com/applications/ultrapure/con…
Because it contains dissolved salts (as well as acids/bases). Ions in the water play the role of electrons in the metals.
Because, pure water has no minerals.