(i) Ethanol is heated with concentrated sulphuric acid at 443 K

(i) Ethanol is heated with concentrated sulphuric acid at 443 K.
(ii) Ethanol reacts with ethanoic acid in the presence of an acid acting as a catalyst.
(iii) As ester reacts with a base.

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(iii) CH3COOCH2CH3 + NaOH → CH3COONa + CH3CH2OH.