Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: pleasehelpthankyou on October 31, 2020, 07:52:37 AM

In a table I found for solubility values it says "the solubility is 100 times the mass of anhydrous compound soluble in a unit mass of water", can anyone tell me what is meant by this, in particular when it talks about the "unit mass of water". I would be so grateful for any response.

In which units do you most often express solubility.

in g/100g, however the values seem to be a percentage and some are greater than 100, therefore I wondered whether this had something to do with "unit mass" that it mentions.

in g/100g
Well, you already have a unit mass of water.
What to do when most of the solubilities are small, like 0.02, 0.3, etc. Maybe multiply by some number (eg. 100, 1000) so that all values are integers?

Thanks for the reply. What I am struggling to understand is what "unit mass of water" essentially means?

grams of [whatever] per 1 gram of water (or whatever units you like).

in g/100g

in g/100g
grams od substance per a 100 g unit mass of water