Find the molality of the solution if 2.5 moles of CaBr2 are dissolved in 5 kg of water.

-500 m

-5 x 10-4 m

-0.5 m

-2 m

The rule to calculate molality is as follows:

molality = number of moles of solute / kg of solvent

From the givens:

number of moles of solute (CaBr2) = 2.5 moles

Kg of solvent (water) = 5 kg

Substituting by these givens in the above mentioned equation, we can calculate molality as follows:

molality = 2.5 / 5 = 0.5 m