Alum Scrub To exfoliate the skin, alum scrub can be made and applied. To make a scrub, mix sugar with alum powder and make a paste. Place it on your fingers and rub it gently on your face and ...

They are also given unknown samples marked A, B, and C. One is salt, one is sugar, and the other is alum, which looks like it could be either salt or sugar. Students first use a dissolving test to see ...