Problem: Separate samples of a solution of an unknown salt are treated with dilute solutions of HBr, H2SO4, and NaOH. A precipitate forms in all three cases. Which of the following cations could the solution contain:   a) Pb2+ b) Ba2+ c) Na+

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Separate samples of a solution of an unknown salt are treated with dilute solutions of HBr, H2SO4, and NaOH. A precipitate forms in all three cases. Which of the following cations could the solution contain:

a) Pb2+

b) Ba2+

c) Na+

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Based on our data, we think this problem is relevant for Professor Delgado's class at FIU.