2. 19 16 years, peter debye, a Dutch-born American physical chemist, studied the theory of dipole moment. Debye expanded the research work of Arrhenius solution ionization. Debye thinks that most salts (such as sodium chloride) must be completely ionized, because X-ray analysis proves that they exist in the form of ions in the crystal before dissolution.
3. Debye proposed that every positive ion is surrounded by an ion cloud dominated by negative charges, while every negative ion is surrounded by an ion cloud dominated by positive charges. Each type of ion is "dragged away" by ions with opposite charges, so it seems that the solution is not completely dissociated, but it is not. 1923, he developed a mathematical formula to express this phenomenon.
4. Debye won the 1936 Nobel Prize in chemistry for his research work on dipole moment and his contribution to "understanding molecular structure by studying dipole moment and diffraction of X-rays and electrons in gas".