How to calculate the molality of saturated solution (water + salt)?
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I have 50 mL of the solvent (water) and 9.513g of the solute (salt).
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Answer:
If you take density of water as 1.0g/mL 50mL water = 50g water You have 9.513g NaCl dissolved in 50g H2O Mass dissolved in 1000g (=1.0kg) H2O = 1000/50*9.513 = 190.26g NaCl in 1.0kg H2O Molar mass NaCl = 58.44 g/mol 190.26 = 190.26/58.44 = 3.26 mol NaCl You have 3.26mol NaCl dissolved in 1.0kg H2O Molality = 3.26m
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