Question

In what way K_f and K_b are similar and in what way they are different?

Answer 1

1. Similarity between K_f and K_b:
   K_f and K_b are molal depression in freezing point constant and molal elevation constant respectively. They are characteristic of solvent and independent of the solute. That is, the value of K_f and K_b depends only on the type of solvent and not on the nature of solute dissolved in it. Both K_f and K_b have
   units of K kg mol⁻¹.
2. Difference between K_f and K_b:
   K_f is the depression in freezing point produced by 1 molal solution of a nonvolatile solute while Kb is the elevation in boiling point produced by 1 molal solution of a nonvolatile solute.