Question

25g of magnesium chloride (MgCl2) was dissolved in 250 ml distilled water at 25oC. The density of water was 0.9975g/cm3. Calculate the concentration in molality
m = mols/kg solvent
mols = g/molar mass = ?
mass solvent in g = volume x density. Then convert to kg.
Substitute into m = mols/kg solvent and that is m.

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