A sample of water from a local river is collected for testing. There are three possible contaminants that may be present: lead ions $(P{b}^{2+}),$ magnesium ions $(M{g}^{2+}),$ and Zinc ions $(Z{n}^{2+}).$

Using a table, design a series of tests that can be conducted to accurately identify which contaminant ions are present. Be sure to show the results for each test.