Write the reaction equation that can be used to obtain butane from methane and inorganic reagents.

Let’s write down the chain of transformations:
NaOH – CH3COONa – CH4 – CH3Cl – C4H10
Let’s implement the solution:
NaOH + CH3COOH = CH3COONa + H2O – exchange reaction, sodium acetate was formed;
CH3COONa + NaOH = CH4 + Na2CO3 – exchange, methane gas is released;

CH4 + Cl2 = CH3Cl + HCl – substitutions, chloromethane obtained;

2СН3Cl + 4Na + C2H5Cl = 4NaCl + C4H10 – the Wurtz reaction, butane was obtained due to the lengthening of the carbon chain.
The scheme of transformations given for the solution shows the relationship between inorganic and organic substances. The reaction products are of practical importance, for example, methane and butane are used as fuels in natural gas.