[cape]

Hi, I have quick question. If a solution contains 2500 ppm (parts per million) of a substance does that equate to 2500 ppm concentration in the air? If not, how does one do the calculations? If it matters, the substance I am referring to is formalin ( 37% solution of Formaldehyde). If temp matters, lets just say 75 degree. Also, how many ppm does 37% formalin contain? I read somewhere 2500 but site does not seem too reliable. Thanks, any help would be much appreciated.

[llagetias]

I am not sure I really understand the question. But if you want an aqueous to gas calculation, maybe you should solve for the unknown in the aqueous form and then use a chemical equation like X(aq) reactant to X(aq) product, although the exact reaction may be different.