Question

When 2 gram of k o h is dissolved in 20 gram of water calculate the molality of solution?

Answer 1

200 g water = 0.200 kg water = 0.200 L water

M * V = mass / molar mass

(M) (0.200 L) = 3.92 g / 98.08 g/mol

(M) = 0.039967374 moles / 0.200 L

M = 0.1998 M