The study of solutions is of great importance because most of the interesting and useful chemical and biological processes occur in liquid solutions. Generally, a solution is defined as a homogeneous mixture of two or more components that form a single phase. All biological and many chemical systems are aqueous solutions containing various ions. The stability of biomolecules and the rate of many biochemical reactions are highly dependent on the type and concentration of the existing ions present. It is important to have at least a qualitative understanding of the behaviour of ions in solutions. Aqueous solutions of simple polar non-electrolytes are very interesting as long as many of them are components of biological fluids or very similar to the monomeric units of biological macromolecules (1, 2). The study of the behaviour of the vitamins in aqueous solutions is useful models for understanding the thermo dynamical behavior of proteins, especially in determining the polar group contributions to the biopolymer (3, 4).