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10 Nov 2019

A 100.0-mLaqueous sodium chloride solution is 14.6% NaClby mass and has a density of 1.12 g/mL.What mass of solute would you add to make the boiling point of thesolution 104.3C (Usei = 1.8 for NaCl)

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Deanna Hettinger
Deanna HettingerLv2
20 Jan 2019

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A student is tasked with determining the concentration of an unknown aqueous sodium chloride (NaCL) solution. A 10.0 mL sample of the solution weighs 21.6 g. The sample is heated over a flame. As it is heated, the water solvent evaporates, leaving a dried NaCl solute residue. After drying, the dish is reweighed and the residue is found to have a mass of 0.8 grams.
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