Answered: Now the student wants to test the…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 125QRT: A student set up an experiment for six different trials of the reaction between 1.00-M aqueous...

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Now the student wants to test the decanoate from question 5 for the presence of the remaining cation. She adds 6M HNO3 to the decanoate until it is acidic. What is the color of the precipitate? Write the balanced chemical equation for the reaction that occurred. To summarize the student’s results, which of the Group I cations can the student conclude are present in UK #1?

* here is question 5 with the answer *

Now the student wants to test the precipitate from the G1-2 step (question 3) for the two remaining cations. In the G1-3 step, she adds 6M NH3 to the precipitate, stirs and centrifuges. The clear supernatant is decanted into a new test tube. Which of the chloride salts of the Group I cations dissolves in aqueous NH3? Write the balanced chemical equation for this reaction.

In the G1-3 step, AgCl dissolves in 6M NH3 since it forms a soluble complex ion with ammonia and HgCl2 in insoluble.

AgCl +2NH3 Ag(NH3)+2+Cl-

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