Question

A solution containing 0.5 g of KCl dissolves in 100 g of water and freezes at - 0.24°C. Calculate the degree of dissociation of the salt. (K_f for water = 1.86°C), Atomic weights [K = 39, Cl = 35.5]

Answer 1

w = 0.5 g of KCl

K_f = 1.86°C

W = 100 g of water

m of KCl = K + Cl

= 39 + 35.5 = 74.5 g