Question

calculate the concentration of a solution in volume % made when 56 grams of water is mixed with 0.17 liters of ethanol?

Answer 1

Volume of water = $\frac{mass}{density}=\frac{56g}{1gc{m}^{-3}}=56c{m}^{-3}=56ml$
Volume of ethanol = 0.17$\times 1000ml=170ml$
volume of solution = (56 + 170) mL = 226 mL
concentration per cent by volume =$\frac{56}{226}\times 100=24.78$%