2. What concentration of sodium chloride in water is needed to produce an aqueous solution isotonic with blood (II=7.70 atm at 25℃)(4%)

8. Extraction of a three-component mixture containing benzoic acid, m-nitroaniline and azobenzene dissolved in CH2Cl2. Combination of the extraction flow sheet can also be used to isolate each of the components of a ternary mixture containing benzoic acid, m-nitroaniline and azobenzene. Please predict A, B, C, D, E. (10%)