A 2 Molar solution results when 2 moles of solute are dissolved in enough water to make 1 liter of solution. A unsaturated solution can dissolve more solute. If 20 mL of water and 20 mL of 3 M NaOH are mixed, the new concentraion is 1.5 M NaOH 13. Water will dissolve all ionic compounds. 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.