A chemist prepares a mixture of hexane and toluene at a temperature of 27.0 °C. He measures out 5.17 mL of hexane and mixes it with 73.6 mL of toluene. t measures the volume of the solution after it is well mixed and finds that it is 82.7 mL. The density of hexane is 0.66 g/mL and the density of toluene is 0.87 g/ml.
Calculate the volume percent of hexane in this solution.
Be sure your answer has the right number of significant digits
To calculate the volume percent of hexane in the solution, we first need to determine the total mass of the solution.
First, we calculate the mass of hexane:
mass of hexane = volume of hexane * density of hexane
mass of hexane = 5.17 mL * 0.66 g/mL
mass of hexane = 3.41 g
Next, we calculate the mass of toluene:
mass of toluene = volume of toluene * density of toluene
mass of toluene = 73.6 mL * 0.87 g/mL
mass of toluene = 63.832 g
Now, we calculate the total mass of the solution:
total mass = mass of hexane + mass of toluene
total mass = 3.41 g + 63.832 g
total mass = 67.242 g
Next, we calculate the volume percent of hexane:
volume percent of hexane = (mass of hexane / total mass) * 100%
volume percent of hexane = (3.41 g / 67.242 g) * 100%
volume percent of hexane = 5.07%
Therefore, the volume percent of hexane in this solution is 5.07%.