solution %

[armageddon]

I see, w/v isn't a real *percentage* in the mathematical sense but rather a (nevertheless useful) *unit* for concentrations of solutions consisting of dissolved (solid) substances. Therefore my "w/v" post didn't exactly answer the question of this thread ("what does % mean?").

I just wasn't happy with your suggestion to change my supplier because of "unscientific measurement/labelling"...

A

[hypo]

the whole absurdity of stating a %(w/v) should become clear when
you give the %age of a concentrated H2SO4 solution: it has 180%!
what the heck is a 180% solution!? is there more in the solution
than the solution itself!? if i ever make such a thing i know what
to do: drop it and run as fast as i can out of fear that if colapses
into a singularity and opens a worm hole... i mean having a few ml of
physical impossibility can not be healthy....  

and while we're at it, %(v/v) sucks too for everything but perfect
gases or liquids: with what volume are you working, the volume of
the pure isolated substance or the effective volume inside the
solution? i think i'll write a nastygramm to my beer supplier...

[r2e3]

chemists......

still vex the hell out of me..    

why not maths god???