Question 2 [20 points]

Consider a mixture of methanol (55%), formaldehyde (23%) and a variety of other solvents.

If the other solvents have an average density of 0.831 g/cm3, estimate the density of the

mixture

a) Assuming volume additivity [10 pts]

b) Assuming average of the pure-component density [10 pts]

The density of methanol and formaldehyde are 798 kg/m3 and 815 kg/m3, respectively.