Question

Complete the reactions 1.CH3CH2OH-CONC.H2SO4

Answer 1

CH3CH2OH −→−−−−−conc H2SO4  CH2=CH2  [ethene] +   H2O

Answer 2

This reaction is a dehydration reaction which turns CH3CH2OH (ethanol) into C2H4 (ethene). The H2SO4 (sulphuric acid) which is added as concentrated sulphuric acid, is a catalyst. The acidic environment enables the -OH group to be more easily removed from the ethanol for it to form ethene.

CH3CH2OH ----(conc H2SO4, @170C)-----> C2H4 + H2O