In the double indicator titration of a mixture containing , , and using an acid, which of the follow — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Phenolphthalein changes color around pH 8-10, signaling the end of strong base ($NaOH$) neutralization and the conversion of $CO_3^{2-}$ to $HCO_3^-$. Methyl orange changes around pH 3-4, signaling total neutralization to $H_2CO_3$. Thus, for pure $Na_2CO_3$, the volume to phenolphthalein ($V_1$) is half the total volume to methyl orange ($V_2$). Statement D is false.