Electricians have to know chemistry because there are circuits. If the circuits arent working its because of corrosion. corrosion is when there is a leak or loose joints in the circuit. The way to stop corrosion from happening is with pbc and aluminium pipes.The word equation for this chemical reaction is Ph(s)H2SO4(aq)--PbSO4(aq)+H2(g). corrosion is a synthesis reaction because to elements are combined to make one. This reaction is when a metal is exposed to oxygen for too long. This happens in the work place because if cut wires are exposed to H2O for too long it will cause corrosion. The product is changing its appearance in colour. The purpose of the reaction is to blow objects up.