[tim__jones]

Hi

I need to make a dilute solution of sulphuric acid in water which will have a known concentration of free sulphate ions (192 mg/L). I therefore need to know the sulphate concentration of a dilute solution of sulphuric acid. What is the best way of doing this? Can I just make up some solutions and test the sulphate concentration by ion chromatography? Do I have to worry about varying dissociation at different concentrations?

Thanks for your *delete me*

[Arkcon]

From your setup, it is actually pretty easy to figure out, without an instrument.  Can you start with an ioinc formula for the dissociation of sulfuric acid?

[enthaegon]

Which ions exists in a solution of sulphuric acid ? How are they (their concentrations) connected to each other ? You have known [SO4--]. Browse around the internet and prepare to calculate few square equation (i think it is a square one).