Question

1. You have a solution that you believe contains either ANO, or Fe(NOX). Describe a test that will let you confirm which is present. Describe the test in detail, and include a chemi- cal equation. 2. Would any of the tests you have used let you determine if a solution contained the potas- sium ion, K+? Either identify a test, or explain in detail why such a test is not possible using the simple methods described here. 3. A sample of solid ammonium chloride, NH,Cl is heated. As it is heated, the mass of the solid decreases and an extremely pungent odor is observed. Write a balanced chemical equation for this reaction, and write the net ionic equation.

Answer 1

1) To determine if the solution is AgNO₃ or Fe(NO₃)₃ we will add a some diluted HCl in the solution, if we get a white precipitate then we can confirm it to be AgNO₃ and if we get yellowish brown solution then we can say it is Fe(NO₃)₃

The reactions:

AgNO₃ + HCl = HNO₃+ AgCl (white precipitate)

Fe(NO₃)₃ +  3HCl = 3HNO₃ + FeCl₃ (yellowish brown solution)