Question

Q.14)
Which sentence is flase about iodimetry ? (1
marks )
Ans.
titrations with a standarded
solutions of iodine
Direct method
Titrant is 12 and analyte is
reducing agent
Free 12 is convereted to 1 ion with
reducing agent​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

THE INCORRECT SENTENCE IS THAT TITRANT IS I2 AND ANALYTE IS REDUCING AGENT.

Explanation:

• Iodometric titration consist of iodide which is oxidized with the help of an acid to give I2, then it is titrated with a reducing agent, so iodide is again formed.

• In this KI is used and sulphuric acid/ hydrochloric acid is added to produce I2.
• Then it is titrated with Na2S2O3 which is a reducing agent.

• Th titrant is reducing agent. The analyte is I2.

• Therefore the false sentence is that "Titrant is I2 and analyte is reducing agent."

     $Cl_{2} + 2I --------- > 2Cl^{-2} + I_{2}$

     $I_{2}+ Na_{2} S_{2} O_{3} -------- > Na_{2} S_{4} O_{6} + 2I^{-}$