Answer to Question #131644 in Chemistry for Ruth

Question #131644

Calculate the mass of ethyl alcohol which must be dissolved in 750 grams of water to make 0.5m solution. Full solution.

Expert's answer

Сm = n_(solute)/m_(solvent)

n=m/M

M(C₂H₅OH)=46 g/mol

n(C₂H₅OH)=0.5x0.75=0.375 mol

m(C₂H₅OH)=0.375 x 46 = 17.25 g

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