How is O3 (ozone) estimated quantitatively?
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: Estimation of O3 is done by treating it with excess of KI solution buffered with borate buffer (pH 9.2) when I2 is liberated quantitatively. ... (aq) + I2 (s) + O2(g) The I2 thus liberated is titrated against a standard solution of sodium thiosulphate using starch as indicator.
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