In the following reaction \[\begin{align} & 2Al+3ZnS{{O}_{4}}\to A{{l}_{2}}{{(S{{O}_{4}})}_{3}}+3Zn \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(aq)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(aq) \\ \end{align}\] The colour (aq) of the solution (aq) will change from