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Testing for cation (3) in unknown solution using aqueous ammonia

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In this video, I will demonstrate how to carry out the test for an unknown cation using aqueous ammonia
Observation: Blue ppt forms, soluble in excess aqueous ammonia, forming a dark blue solution
Conclusion: Copper(II) ion is present in unknown solution
Observation: Blue ppt forms, soluble in excess aqueous ammonia, forming a dark blue solution
Conclusion: Copper(II) ion is present in unknown solution