In case of rainwater if bicarbonate ion is not measured directly then what are the other processes to calculate bicarbonate ion concentration for a particular rain event?
Bicarbonates concentration might not be decided based on pH. hardness, alkalinity need to be done.
Thank you.
yes we can. Bicarbonate concentration = 10^(-11.24+pH) in eq/l
Please go trough the following article
http://www.sciencedirect.com/science/article/pii/S0169809508002433
Thank you Arindam. I have found another relation between pH and bicarbonate like HCO3-= 10^(pH-5.05). Is this appropriate to use this kind of relation?
Thank you all for asking the question and sharing the papers. Did you decide which formula works for the bicarbonate concentration prediction?
To calculate Bicarbonate values, both pH and alkalinity vales must first be determined. Total dissolved solids also play a key role in final calculation. For if the TDS< 500mg/L, then total alkalinity shall be used for estimation. If TDS> 500mg/L, then bicarbonate is estimated from phenophalein alkalinity
Also note all Carbonates are converted to bicarbonates by pH 8.3
pH = 14 – ½ × pKb + ½ × log [B]
where [B] is the bicarbonate conc
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