If we compare the equations for Raoult’s law and Henry’s law, it
can be seen that the partial pressure of the volatile component or gas
is directly proportional to its mole fraction in solution Only the
proportionality constant KH differs from p1
0 Thus, Raoult’s law becomes
a special case of Henry’s law in which KH becomes equal to p1
0 Another important class of solutions consists of solids dissolved in
liquid, for example, sodium chloride, glucose, urea and cane sugar in
water and iodine and sulphur dissolved in carbon disulphide