chemistry

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The density of a 60% (m/m) ethanol solution 0.8937g/ml , calculate the molarity of the solution , step by step .
Molar mass of ethanol = 46.07

  • chemistry -

    60% (m/m)=60g of ethanol out of 100g in solution.


    60g of ethanol*(1 mole/46.07g)= moles of ethanol


    Density=mass/volume

    Solving for volume,

    Volume=mass/density

    Total volume=100g total solution/0.8937g/ml


    Molarity=moles/volume in L

    Molarity of ethanol solution=moles of ethanol/Total volume*(10^-3)

    It could be an easier way to do this, I just cant think of it at the moment.

  • chemistry -

    One other thing, your answer should only have 2 significant figures.

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