Calculate the concentration, in percent by mass, of a refrigerant brine solution which is 4.03 M in NaCl with a density of 1.116 g mL-1.

detailed answer, please, i don't understand how to do this at all!!!

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  1. Assume some volume, say 1 liter.

    Then the mass is 1116grms, from the density.

    4.03=moles/lites >> 4.03moles in solution.

    mass solute= 4.03*molmassNaCl= 4.03*53

    percentmass= masssolute/massollution * 100

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  2. Just a quick note to say Bob P obviously hit the wrong key for molar mass NaCl. You should confirm this number yourself. It's closer to 58.5 but that isn't exact.

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  3. thanks a lot guys, i got it!!! :)

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