Question

A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.

Answer 1

Answer:

A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality. 12.5% by volume means 12.5 mL ethanol/100 mL of solution.

Answer 2

Answer:volume ( c2 H5OH) = 112,5%

density 0,7789g/mL

Density = m/v

0,789 = m/112,5

m= 9,862g

n= m/Mr

=9,862g/46,07

=0 ,214 mol

C = n/v

C = 0,214/ 12,5

C =0, 0017 m

Explanation:firstly have lolook for a Mass . Then calculate the number of moles where you will be able to find Concentration