Water (H2O) molecules are polar; tiny positive poles are created at the hydrogen ends and tiny negative poles are formed at the oxygen ends. The molecules of water contain two covalent bonds between oxygen and two hydrogen atoms. Water is a powerful solvent. The hydrogen side of each water molecule carries a slight positive electric charge, while the oxygen side carries a slight negative electric charge. This helps water dissociate ionic compounds into their positive and negative ions. The positive part of an ionic compound is attracted to the oxygen side of water while the negative portion of the compound is attracted to the hydrogen side of water. This way water dissolves almost all polar as well as ionic compounds. That is the reason water is termed a universal solvent. Water condenses at 0 degree centigrade. Hence something that condenses below 0 degree centigrade cannot be pure water. Hence this is not a quality of water.