Question 11
The formula of ethanol, also know as grain alcohol, is C2H6O.
What is the mass percent concentration of ethanol in the solution if 8.80 g of ethanol is dissolved in 67.4 g of water?
The first step is to calculate the total mass of the solution:
Total mass = mass of ethanol + mass of water
Total mass = 8.80 g + 67.4 g
Total mass = 76.2 g
Next, we need to calculate the mass percent concentration of ethanol in the solution:
Mass percent concentration of ethanol = (mass of ethanol / total mass) * 100%
Mass percent concentration of ethanol = (8.80 g / 76.2 g) * 100%
Mass percent concentration of ethanol = 0.1152 * 100%
Mass percent concentration of ethanol = 11.52%
Therefore, the mass percent concentration of ethanol in the solution is 11.52%.