The qualitative analysis experiment you did is actually an abbreviated version of a much larger analysis scheme in which many different cations are separated and identified. Suppose a mixture contains Ag+, K+, NH4+, Hg22+, Pb2+, Mg2+, Sr2+, Ba2+, Cu2+, Al3+ and Fe3+.
Required:
a. What ions could you separate, by causing them to precipitate, with the addition of HCl?
b. After the addition of HCl, the above sample is centrifuged and decanted. Which cations remaining in the supernatant could you separate, by causing them to precipitate, with the addition of H2SO4?
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