Question

Ethylene glycol, C2H6O2, is an odorless, colorless, sweet-tasting liquid used in antifreeze formulations. The antifreeze formulations are 56% ethylene glycol by mass. (Assume the density of the ethylene glycol solution is 1.072 g/mL).What volume of a solution contains 0.350 moles ethylene glycol, C2H6O2?

Answer 1

The first step to solve this problem is using the molecular mass of ethyleneglycol to find the mass of 0.350moles of this compound.

`0.350mol\cdot(62.07g)/(mol)=21.7245g`

Use the percent by mass to find the mass of the solution, remember that there are 56g of ethyleneglycol for every 100g of solution:

`21.7245g\cdot(100g)/(56g)=38.79375g`

Use the density of the solution to find how many mililiters contain the estimated mass of solution :

`38.79375g\cdot(ml)/(1.072g)=36.18ml`

The volume of solution that contains 0.350 moles of ethylene glycol is 36.18ml.