Question

Which sentence is false about iodometry ? *

Answer 1

Explanation:

iodometry involves direct reaction of I2 solution with sodium thiosulphate solution

Answer 2

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."

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

[Your question is incomplete, but most probably your full question was -From the above two titrations, we can determine the amount of Cl2.

Which sentence is flase about iodimetry ?

a) Covers the titrations with a standarded solutions of iodine.

b)Direct method

c) Titrant is I2 and analyte is reducing agent.

d) Free I2 is convereted to I¯ ion with reducing agent ]