In making one liter of a 1.0 M NaCl solution, a student added exactly 1.0 L of w

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In making one liter of a 1.0 M NaCl solution, a student added exactly 1.0 L of water to 58.44 g of NaCl and mixed the two thoroughly. Which error was made?

May 13th, 2015

Molarity  = moles of solute/volume of solution (L)

volume of solution  = volume of solute  + volume of solvent.

but he took already volume of solvent  = 1 L 

then after addition of NaCl volume of solution will be higher   therefor the solution will be less than 1.0 M.


Correct way to make the 1.0 M NaCl is first dissolved 58 .44g NaCl in  approx 500 -600 mL water then make the volume up to 1L .

so that total volume of solution will be 1 L 

molarity  = moles/ V(L) = 1/1  = 1.0 mL


 regarding any further query you may ask. 



 

May 13th, 2015

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May 13th, 2015
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