## General Chemistry: Principles and Modern Applications (10th Edition)

$(NH_4)_2CO_3$, $H2S_{(aq.)}$ and $NaOH$ form precipitates with the two ions, so they will not work. Neither $HNO_3$ nor $NH3_{(aq.)}$ will work because neither ion would precipitate. $HCl_{(aq.)}$ will work because $AgCl$ is not water soluble and $CuCl_2$ is.
$(NH_4)_2CO_3$, $H2S_{(aq.)}$ and $NaOH$ form precipitates with the two ions, so they will not work. Neither $HNO_3$ nor $NH3_{(aq.)}$ will work because neither ion would precipitate. $HCl_{(aq.)}$ will work because $AgCl$ is not water soluble and $CuCl_2$ is.