Question
Asked Nov 20, 2019
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2.
What is the molality of a solution made by dissolving 12.5 g NaCl in 1 L of H2O?
 
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Expert Answer

Step 1

Given,

The mass of NaCl = 12.5 g

Volume of the solution = 1 L

  • Conversion of grams of NaCl into moles: -
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Mass Moles of NaCl = Molar mass 12.5 g 58.44 g/mol = 0.213 mol

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Step 2
  • The molality can be calculated by the ...
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Moles of solute Molality Mass of solvent in Kg 0.213 mol 1Kg 0.213 m

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