Posted by Mira on Sunday, November 25, 2012 at 2:17am.
% w/w means mass solute/100 g soln.
mass solute = 12.0 g NaCl.
mass solvent = 100 g
mass solution = 100g + 12g = 112g.
%w/w NaCl = (12.0/112)*100 = ?
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