when you dissolve salt in water,it conducts electricity.
Answers
yes,when we dissolve salt in water it conducts electricity.
Conduction of electric current takes place via charged species. Be it ions(cations or anions) or electrons.
When a salt is present in crystal or powder form the constituents aren't free to move. Generally salts have ionic bonding (attraction forces between opposite charges) which is very strong. And it needs high amount of energy to break it. Since there are no freely available charged species salt crystals don't conduct electricity.
Now when salt is dissolved in water it dissociates into it's ionic species. (This is due to hydrolysis. H+ and OH- ions attract the respective opposite charged species and since they are large in number. So, many H+ will be attracting the negative entity and similarly OH- will be attracting positive entity which finally leads to dissociation of salt). In aqueous solution ions are free to move and hence conduction takes place.
Hope it helps. :)