Make a reaction equation: Calcium carbide → acetylene → vinyl acetylene → butane.

Let’s write down the equations for organic substances:
CaC2 + 2H2O = Ca (OH) 2 + C2H2 – hydration reaction, acetylene obtained;
2C2H2 = C4H4 – vinyl acetylene is released during the oligomerization of acetylene in the presence of CuCl, NH4C;
С4Н4 + Н2 = Н2С = СН – СН = СН2 – hydrogenation, butadiene 1,3 is formed
Н2С – СН – СН = СН2 + 2Н2 = Н3С – СН2 – СН2 – СН2 – butane was obtained in the process of butadiene hydrogenation – 1,3.
These reactions show the relationship between inorganic and organic substances, as well as between the classes of alkynes and alkadienes. The reaction products find practical applications, for example, butalien-1,3 is used in the production of rubber.