Solubility to Milality of NaCl
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Solubility to Milality of NaCl

[From: ] [author: ] [Date: 11-05-10] [Hit: ]
582 X 10 = 5.Just repeat this for the others.........
Help me! Convert the following solubilities of NaCl in g/100mL to molality (mol solute/kg solvent).

Temp 0.0 Solubility 34.0
Temp 25 Sol 35.7
Temp 80 Sol 39.0
Temp 100 Sol 41.0

If you can do one of the Conversions to molality (NOT MOLARITY :) I will be able to do the rest. I'm sure it's gotta be pretty darn simple. Thanks!!

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Just take the mass solubility (34.0 g/100 mL) and first convert the mass into moles using the molar mass of NaCl:

34.0 g/100 mL / 58.44 g/mol = 0.582 mol/100 mL

Then, convert the volume part to 1000 mL (this is assuming that the solvent is water and that its density is pretty close to 1 g/mL). In several steps:

0.582 mol/100 mL X 1 mL/g X 1000 g/kg = 0.582 X 10 = 5.82 molal

Just repeat this for the others...
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