Posted by Tina on Sunday, February 13, 2011 at 7:15pm.
i think its 1 but im not sure. am i right ?
Crystals dissolve in water because the heat of solution of the ions is enough to overcome the lattice forces holding the crystal together. The water molecules are dipoles with the H end positive and the O end negative. The negative end of water molecules is attracted to the Na^+ and the positive end of the water molecules is attracted to the Cl^- ions. Look in the answers where opposite charges attract (because like charges repel so those won't happen).
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