Chemistry

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A solution of ethanol (C2H5OH) in water is prepared by dissolving 61.9 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?

  • Chemistry -

    grams ethanol = volume x density.
    moles ethanol = grams/molar mass.

    M = moles/0.250 L = ??

  • Chemistry -

    Mass=vxd=61.9mlx0.79ml=48.9g since we have found mass then moles=48.9g/46.08 g/mol=1.06mol since we have found the number of moles then we can find the conc. Of ethanol in 250mL which is molarity=moles / volume=1.06mol/0.250l=4.24mol/L

  • Chemistry -

    Wi is the molarity of ethanol (c2h50h)

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