Does a polar molecule dissolve in water?
Many solutes dissolve in water because water is a very polar compound. A general rule: like dissolves like. For example, polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes. Ocean water is composed of many substances, many of them salts such as sodium, magnesium, and calcium chloride. They are also polar molecules and are dissolved in water.