What mass of ethylene glycol C2H6O2, the main component of antifreeze, must be added to 10.0 L water to produce a solution for use in a car's radiator that freezes at -23.3 degrees Celsius? Assume the density for water is exactly 1 g/mL

Answer 1

Use the freezing point depression

-23.3=molessolute/10kgwater * -.52

calculate the moles of solute (tehylene glycol) and convert that to mass.

Answer 2

A small correction here to correct a typo. The -.52 should be -1.86.