ATORY TESTS Confirmatory tests should be performed on separate solutions of some of your ions, in order to see what these tests look like before using them on an UNKNOWN. Generally a confirmatory test is used only after other reactions have been used to isolate the ion. When working with stock solutions of an ion, dilute 1 drop with 9 drops of water to simulate the concentration that would exist in an unknown. In a mixture or a solution obtained from an unknown or known mixture, the dilution is not necessary since the ions have already been diluted COMPARED to the stock solutions. In the tests described here, it is assumed that 10 drops of solution will be used. If you change the amount of solution of the ion being tested, you must also adjust the amounts of the REAGENTS to be added.Tests Based on Hydrogen SulfideAntimony, Sb3+Cadmium, Cd2+Mercury(II), Hg2+Tests Based on Other ReagentsAluminum, Al3+Ammonium, NH4+Bismuth, Bi3+Calcium, Ca2+Chromium, Cr3+Cobalt, Co2+Copper, Cu2+Iron, Fe3+Magnesium, Mg2+Manganese, Mn2+Mercury(I), Hg22+Mercury(II), Hg2+Nickel, Ni2+Silver, Ag+Strontium, Sr2+Tin, Sn2+Zinc, Zn2+