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What happens when ethyl chloride is treated with bleaching powder?

What happens when ethyl chloride is treated with bleaching powder?

Grade:12

2 Answers

Aman Bansal
592 Points
9 years ago

Dear Mohini,

 Ethanol (ethyl alcohol) or propanone (acetone) when treated with bleaching powder gives chloroform. This reaction is known as haloform reaction.

  • From ethanol

The reaction occurs as the bleaching powder reacts with water giving chlorine and calcium hydroxide as:

laboratory method of chloroform preparation

The reaction proceeds in three steps:

First step is the oxidation of ethyl alcohol to give acetaldehyde.

First step is the oxidation of ethyl alcohol in haloform reaction

Second is chlorination of acetaldehyde to form chloral (trichloroethanal)

formation of chloral in haloform reaction

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Rishi Sharma
askIITians Faculty 646 Points
one year ago
Dear Student,
Please find below the solution to your problem.

Ethyl alcohol reacts with bleaching powder to give chloroform (CHCl3​).
This reaction is called haloform reaction and occurs in several steps.
CaOCl2+H2​O→Ca(OH)2​+Cl2​
H2​O+Cl2​→HCl+[O]
C2​H5​OH+[O]→CH3​CHO+H2​O
CH3​CHO+Cl2​→CCl3​CHO
2CCl3​CHO+Ca(OH)2​→2CHCl3​+2(HCOO)Ca

Thanks and Regards

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