Posted by Adam on Sunday, February 19, 2012 at 9:39am.
M = moles/L soln
moles KNO3 = grams KNO3/molar mass = 72.5/101.1/2L soln = 0.359 to confirm the 0.359 stated in the problem.
m = mols/kg solven
0.7171/kg solvent. We must calculate the kg solvent.
0.354 = 0.7171/kg solvent and
kg solvent = 0.7171/0.354 = about 2.026 kg. (Confirm: 0.7171/2.026kg = 0.354.
The total mass of the solution, therefore, is 72.5 g + 2,026 g = 2098.5.
%soln w/w = (g KNO3/total mass)*100 =?
m = moles/kg solvent
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