1. Suppose you are given an unknown aqueous solution that contained one of the f

Question

1. Suppose you are given an unknown aqueous solution that contained one of the following cations: Ag+, Ba2+, or Na+ ions. You have available the following test solutions: 1 M sulfuric acid and 1 M hydrochloric acid. Explain how you would use these test solutions to determine the identity of the cation in the unknown solution. Using complete sentences and proper terms, explain the tests you would perform, the expected outcomes, and how the results would allow you to determine the presence or absence of each particular cation.

Explanation / Answer

First divide the solution into two test tubes.

1) In first test tube, add 1M HCL, if there is Ag+ then it will give White precipitate of AgCl

2) If it does not form white precipitate in step 1, then add 1M sulfuric acid to the second test tube. If there is Ba2+ then it gives White precipitate of BaSO4.

3) If it does not give white precipitate in both the above steps, then it is Na+

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