Which of the following reactions occurs durin | vedclass

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(A) In iodometric titration,an oxidizing agent reacts with excess iodide ions $(I^-)$ in an acidic or neutral medium to liberate iodine $(I_2)$.The li

Vedclass · Accepted Answer

$Cr_2O_7^{2-} + 14H^+ + 6I^- 	o 2Cr^{3+} + 3I_2 + 7H_2O$; $I_2 + 2S_2O_3^{2-} 	o S_4O_6^{2-} + 2I^-$

Vedclass · Answer

(A) In iodometric titration,an oxidizing agent reacts with excess iodide ions $(I^-)$ in an acidic or neutral medium to liberate iodine $(I_2)$.The liberated iodine $(I_2)$ is then titrated against a standard solution of sodium thiosulfate $(Na_2S_2O_3)$.The reaction $Cr_2O_7^{2-} + 14H^+ + 6I^- 	o 2Cr^{3+} + 3I_2 + 7H_2O$ represents the liberation of $I_2$,followed by the titration reaction $I_2 + 2S_2O_3^{2-} 	o S_4O_6^{2-} + 2I^-$.Therefore,option $A$ correctly describes the iodometric titration process.

Which of the following reactions occurs during iodometric titration in the laboratory?

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