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18 March, 09:33

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

+2
Answers (1)
  1. 18 March, 10:02
    0
    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
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