Posted by confuzzled on Sunday, September 18, 2011 at 5:50pm.
What kind of percent is that? percent w/v
2.5M means 2.5 moles NaCl/L soln.
grams = moles x molar mass
So yo have grams/L, convert to g/100 mL and that is percent NaCl.
10%w/v means 10g NaCl/100 mL which makes it 100 g NaCl/L soln.
100 g = ? moles. moles = g/molar mass so that is the molarity.
1.7M
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