12 H 26 have London forces keeping molecules in the liquid. Water is a polar molecule and is a good solvent for ionic and polar solutes. Nonpolar substances do not dissolve well in water. Gas solubility in water decreases when the temperature goes up. Adding 9 mL of water to 1 mL of 4.0 Molar HCl will cut the concentration by a factor of ten to 0.40 M HCl.
Ionic substances dissolve to form electrically conducting solutions.