Balance the molecular equations based on the reactions you mixed together and write the complete ionic equations and net ionic equations for all of the reactions that you tested that gave you a precipitate. if you got "no reaction" because you did not get a precipitate, then write the ionic equation by listing the ions for all the aqueous solutions on the reactant side and then an ---> and the words "no reactions".
CuCl2(aq) + KCl(aq) -----> CuCl2 + KCl
There's no reaction between them, because they both are soluble chlorides. Cu2+(aq) + 2Cl-(aq) + K+(aq) + Cl-(aq) -----> no reaction