Chapter 14, Problem 82E

Calculate the van’t Hoff factors of the following weak electrolyte solutions:

a. 0.050 m HCOOH, which begins to freeze at $-0.0986°\text{C}$;
b. 0.100 M ${\text{HNO}}_{\text{2}}$ , which has a hydrogen ion (and nitrite ion) concentration of $\text{6}\text{.91}\times {\text{10}}^{-2}$M.