Question

Give the following conversion

a) Ethanol to ethanoic acid
b) Ethanol to ethene

Answer 1

As ethanol is primary alcohol, so on oxidation of ethanol by nascent oxygen (obtained from K2Cr2O7+Dil.H2SO4) it forms aldehyde(acetaldehyde) first and then again on further oxidation by nascent oxygen it forms acetic acid or ethanoic acid (carboxylic acid).

Step 1:—

CH3CH2OH + [O] → CH3CHO + H2O

Step 2:—

CH3CHO +[O] → CH3COOH

(Reaction takes place in presence of oxidizing agent K2Cr2O7 + Dil.H2SO4

K2Cr2O7 + 4H2SO4(Dil.) → K2SO4 +Cr(SO4)3 + 4H2O + 3[O]. )

Answer 2

heya mate ^_^

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A) Ethanol to ethanoic acid

As ethanol is primary alcohol, so on oxidation of ethanol by nascent oxygen (obtained from K2Cr2O7+Dil.H2SO4) it forms aldehyde(acetaldehyde) first and then again on further oxidation by nascent oxygen it forms acetic acid or ethanoic acid (carboxylic acid).

Step 1:—

CH3CH2OH + [O] → CH3CHO + H2O

Step 2:—

CH3CHO +[O] → CH3COOH

(Reaction takes place in presence of oxidizing agent K2Cr2O7 + Dil.H2SO4

K2Cr2O7 + 4H2SO4(Dil.) → K2SO4 +Cr(SO4)3 + 4H2O + 3[O]. )

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B) Ethanol to ethene

Ethanol can be dehydrated to give ethene by heating it with an excess of concentrated sulphuric acid at about 170°C. Concentrated phosphoric(V) acid, H3PO4, can be used instead.

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HOPE IT HELPS : )