[NotionCommotion]

No standard

Thanks, the concentration lectures were helpful, however, there still is no consistency.  Can't you chemists just decide to agree?

I will repeat my earlier question - what precision do you need?

5%*(SG_solution - SG_H2O) would be acceptable.

That's understandable, but be assured it was accidental

I know, but I spend a fair amount of time creating what I thought was a well written post, and hadn't bothered saving a copy of it.  Oh well, to bigger and better things.

Thanks again for your help.

[Mitch]

Can't you just figure it out experimentally, why do you need to calulate this from first principles?

[NotionCommotion]

Because I actually want to know the quantities of various compounds which will result in a given density, and thus there is nothing to experiment other than creating my own tables (don't want to do).  I felt that predicting density based on a given quantity would be easier than predicting the required quantities based on the given density.