Question

Write the chemical equations for the following chemical reactions and name the carbonic compound obtained. (i) Reaction of acidified potassium dichromate solution with ethanol on heating. (ii) Reaction of sodium metal with ethanol. (iii) Reaction of concentrated sulphuric acid with ethanol at 443 K.

Answer 1

Hello Students,

(i) Reaction of acidified potassium dichromate solution with ethanol on heating -

• CH3CH2OH + 2[O] → CH3COOH + H2O
• Carbonic compound - Ethanoic acid

(ii) Reaction of sodium metal with ethanol -

• Na + CH3CH2OH → CH3CH2ONa + ½H2
• Carbonic compound - Sodium ethoxide

(iii) Reaction of concentrated sulphuric acid with ethanol at 443 K -

• CH3CH2OH → CH2=CH2 + H2O
• Carbonic compound - Ethene

Hope I was useful...

Answer 2

Explanation:

i) Ethanol is oxidised to ethanoic acid with the help of acidifiedK2Cr2O7.

CH3CH2OH+2[O] → CH3COOH+H2O

(ii) Ethanol reacts with sodium metal to form sodium ethoxide and hydrogen gas. 2C2H5OH+2Na → 2C2H5ONa+H2

(iii) Ethene is formed when ethanol is heated at 443 K with concentrated sulphuric acid. Concentrated sulphuric acid acts as a dehydrating agent in this reaction and removes a molecule of water.