Redox Reactions and Volumetric AnalysismediumMCQ MULTIPLE

In the standardization of using by iodometry, the following step(s) is/are involved:Redox Reactions and Volumetric Analysis Chemistry Question

Question

In the standardization of $Na_2S_2O_3$ using $K_2Cr_2O_7$ by iodometry, the following step(s) is/are involved:

Answer: A,B,C,D

💡 Solution & Explanation

This represents the standard iodometric titration sequence. $K_2Cr_2O_7$ liberates a stoichiometric amount of $I_2$ from $KI$, which is then titrated against Hypo. Starch is added near the end when the yellow color of $I_2$ fades to straw yellow.

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