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Social ScienceWhat is the molality of a solution of 33g of propanol ( CH3CH2CH2OH) in 152 mL water, if the density of water is 1g/mL?
What is the molality of a solution of 33g of propanol ( CH3CH2CH2OH) in 152 mL water, if the density of water is 1g/mL?
Expert Answer
molality is moles of solute dissolved per kg of solvent
molality = moles/kg of solvent
moles = mass of solute (g)/molar mass of solute (g/mol)
Given here,
mass of propanol = 33 g
molar mass of propanol = 60.09 g/mol
volume of solvent (water) = 152 ml
density of water = 1 g/ml
So, mass of water = 152 ml x 1 g/ml = 152 g
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