Question

When 25 mL of C2H5OH (density 0.80 g.cm-3) is dissolved in water to prepare a 250 mL solution,
the density of the solution was found to be 0.950 g.cm-3. Calculate
a. Molarity of pure ethanol; b. Molarity of ethanol in the final solution; c. Volume of the final solution
which will contain 5.22 mL of pure ethanol; d. Mass of pure ethanol in 25 mL of the final solution;
e. Percentage composition (w/w) of ethanol in the final solution; f. Percentage composition (v/v) of
ethanol in the final solution; g. Molality of ethanol in the final solution; h. Mole fraction of water in the
final solution; i. Volume of final solution needed to prepare 1 liter of 0.087 M ethanol solution; j. Mass of
final solution needed to 250 mL of a 0.1 M solution of ethanol

Answer 1

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