Question

A dermatologist prescribes drysol as a treatment for excessive underarm sweating. drysol contains 15 g of aluminum chloride hexahydrate in 84 ml of an alcohol base. what is the final strength of drysol?

Answer 1

Drysol is a mixture of aluminum chloride hexahydrate and an alcohol base.

Mass of aluminum chloride hexahydrate = 15 g

Assuming the density of alcohol base to be 1 g/mL

Mass of alcohol base =
`84 mL * (1 g)/(mL) = 84 g`

Total mass of the mixture = 15 g + 84 g = 99 g

Mass % of the mixture =
`(15 g)/(99g) * 100`

= 15.2 %