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Measuring Equilibrium Constant at various pH *delete me* - Printable Version

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Measuring Equilibrium Constant at various pH *delete me* - Eugene - 11-19-2018

Afternoon everyone, I'm looking into the equilibrium of SO2 + H2O <-> H3O + HSO3 at low pH (ranging from 3.0 to 4.0).

I have two questions:
Firstly, how can I finely control the pH to be at intervals of say, 0.2?
Secondly, I could not find a method to determine the equilibrium point, beyond spectrophotometry in the UV range which is beyond our school's lab equipment. Any ideas on how to achieve this?

If this is not feasible, could anyone suggest some tangentially related experiments that I could do? Thank you all very much!!!