Which among the following compounds has the highest freezing point of its 1 molal aqueous solution?

Step-by-step solution

The freezing point depression is given by T_f = i K_f m . Since the molality m and the cryoscopic constant K_f are the same for all solutions, the freezing point depends on the van't Hoff factor i . A higher freezing point corresponds to a smaller depression, which implies a smaller value of i . The van't Hoff factor i = 1 + (n-1) , where is the degree of dissociation. For weak acids, i 1 + . Thus, the compound with the lowest degree of dissociation will have the lowest i and the highest freezing point. The degree