why does salt dissolve in water??

July 29, 2008 3:39pm CST
how does the dissolution of salt in water takes place ............ whats the actual reason for it?
1 response
@petiksmode (2984)
• Philippines
29 Jul 08
hmmm this a hard discussion to start with... salt and water have the same polar molecules and shred electrons thus dissolution occurs.. we may also think that since salt is soduim chloride and its propert raises a chemical reaction with place in hydrogen dioxide (water...positive charge molecules attract each other so dissolution takes place...not all property are being dissolve since NaCl is not all polar mlecule if you will invistigate deeply there are crytals being left after the dissolution there are the non polar molecules.. i hope this makes sense,my head aches trying to remember molecular chemistry with this post..lols
• India
30 Jul 08
well dear "petiksmode". I have the exact answer here. although ur answer also is partially correct. well salt as u said is NaCl. It is a completely ionic crystal that has a BCC(body centered cubic) structure.the crystal basically is made up of a lattice of positively charged sodium ions and negatively charged chlorine ions. the water molecule as u may know is a polar molecule with a slight negative charge on the oxygen atoms and a sightly postive charge on the hydrogen atoms. when salt and water come into contact there happens to be an interaction between oppositely charged ions on the water and salt molecule. water molecules surround the salt ions all around them forming a hydration shell. this splits the ions apart leading to dissolution of salt in water and is accompanied by relaese of a small amount of energy called energy of dissolution.think that helps.................! HAVE A NICE DAY