write chemical equations to show what happens when

(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) an ester reacts with a base.

(i) When ethanol is heated with concentrated sulphuric acid H₂SO₄ at 443K, the Ethanol is dehydrated and gives ethane as product

(ii) When Ethanol reacts with ethanoic acid in the presence of concentrated Sulphuric acid as a catalyst, it yield to give a sweet smelling ester, ethyl ethanoate. The reaction is as follows:

(iv) When ester reacts with a base such as Sodium Hydroxide (NaOH), the hydrolysis reaction occurs and the ester gets hydrolysed to form the product alcohol and sodium Ethanoate