What is the % v/v of a 3.2% m/m aqueous solution of ethanol? (Solution density: 1.0 g/mL; ethanol density: 0.8 g/mL)

To calculate the volume/volume (% v/v) concentration of the ethanol solution, we'll need to use the formula: % v/v = (volume of ethanol / total volume of solution) * 100 First, let's calculate the mass of ethanol in the solution: 3.2% m/m of 1 g of solution = (3.2 / 100) * 1 g = 0.032 g of ethanol Now, let's calculate the volume of ethanol: Volume = mass / density = 0.032 g / 0.8 g/mL = 0.04 mL The total volume of the solution is 1 mL. % v/v = (0.04 mL / 1 mL) * 100 = 4% The % v/v of the 3.2% m/m aqueous solution of ethanol is approximately 4%.