How do you identify between salt and sugar?

I know that salt is cubic and sugar is noncubic, but sometimes when I look at both of them real close, salt doesn't look so cubic - so is there another way to find out?

1 Answer
Dec 29, 2016

Well the obvious discriminant is taste...........


Failing that (and of course we really should not consume any chemical of unknown identity), add a bit of ethyl alcohol. Sugar has some solubility in ethyl alcohol, but salt is almost completely insoluble in this solvent.

Melting point is another easy test you could make. You would not get common salt to melt without a blow torch. Sucrose and glucose tend to decompose at lower temperatures.