Question

Recrystallization Step:

The procedure asks for using equal amount by mass of the crude product and the recrystallization solvent, 95% ethanol. Suppose you use 1.2g of product, how many mL of 95% ethanol would you add?

Write the answer with 3 significant figures (e.g. 2.15).

Density of 95% ethanol = 0.86 g/mL

Answer 1

It is given that an equal amount of 95% ethanol is to be used as that of product (1.2 g)

therefore, mass of 95% ethanol to be added = 1.2 g

And, given the density of 95% ethanol = 0.86 g/mL

Now, we know that,

Hence, volume of 95% ethanol required = 1.40 mL