Question

How do I make 95% v/v ethanol that has a density of 0.7893 g/mL?

Answer 1

:/. (v/v) 力odada ση in 100 m L volil me-obho γυ an) phesent om solute in m L - Vo x100 amo 20 从ti on, phese So opre para this oJudi on, Thano ng yind an make up ih idh wator updo ths e volume w pre pared.

There is no use of the density as ethanol is liquid and hence we can directly measure the volume required. But if the solute is solid then we will calculate how much grams of the solid is required using the density formula i.e. density = mass/volume. Using this we will get mass = density × volume.