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  • Please help! - Chemical Kinetics and Surface Chemistry - BITSAT

The role of FeCl_{3} solution when fresh precipitates of Fe(OH)_{3} is shaken in it is of a  

  • Option 1)

    Colloidal solution

  • Option 2)

    Peptising agent

  • Option 3)

    Micelles

  • Option 4)

    Reversible Solution

 

Answers (1)

best_answer

As learned in concept

Preparation of Colloids -

Peptization

- wherein

During peptization, the precipitate absorbs one of the ions of the electrolyte on its surface. This causes the development of positive or negative charge on precipitates, which ultimately break up into smaller particles of the size of a colloid.

 

 Peptization process takes place when fresh precipitate of Fe(OH)_3 is shaken with Fe(Cl)_3 (electrolyte or peptizing agent).  In this, Fe(OH)_3 precipitate is converted into colloidal solution. 

Fe(Cl)_3\rightarrow Fe^{3+}+ 3Cl^{-}

Fe(OH)_3 + Fe^{3+} \rightarrow [Fe(OH)_3Fe]^{3+}+ 3Cl^{-}

Precipitate            Electrolyte                colloidal solution 

 


Option 1)

Colloidal solution

Incorrect option

Option 2)

Peptising agent

Incorrect option

Option 3)

Micelles

Incorrect option

Option 4)

Reversible Solution

Incorrect option

Posted by

Aadil

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