Write the reaction equations by which you can search for ethane to get butane.

1. Let’s write down the chain of transformations:
C2H6 – C2H5Cl – C4H10;
2. Let’s compose the equations for organic substances:
C2H6 + Cl2 = C2H5Cl + HCl – the substitution reaction occurs in the light, ethane chloride and hydrogen chloride are obtained;
2С2Н5Cl + 2Na = C4H10 + 2NaCl – butane is released during the Wurtz reaction.
These reactions show a relationship between ethane and butane, which are homologous and belong to the class of alkanes. The reaction products find use, for example ethane chloride, is used as a solvent.