Sodium chloride is the primary salt dissolved in ocean water. For every liter, there are about 35 grams of salt dissolved in ocean water, which corresponds to a salt concentration of 0.6 moles/liter, since the molar mass of sodium chloride is about 58 grams. Since sodium chloride dissociates into one sodium ion and one chloride ion when dissolved, the solute concentration of ocean water is about 1.2 moles/liter. The physiological salt concentration of human cells, however, is around 0.15 moles/liter, which corresponds to a solute concentration of around 0.3 moles/liter (very similar to a potato!) After providing all that information, if you are stranded on a lifeboat in the middle of an ocean, should you drink ocean water and why or why not?