none of your buiseness
The antonym for "chemical equation" is "non-chemical equation" or simply "equation" if the context is clear that it is not related to chemistry.
I suppose that "chemical reaction" hasn't not a true antonym.
synonym for equation:problem
A chemical equation is a shorthand description of a chemical reaction.
A chemical reaction can be represented by a chemical equation.
From a chemical perspective, the antonym is oxidation In normal conversation, an antonym could be "enlargement"
nonchemical
ppop
chemosythasys
A chemical reaction is represented by a chemical equation.
The chemical equation for potassium is K.
Power hasn't a chemical equation.