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In lab this week, one part was a Stability Sequence. with AgNO3 and NH3. In the

ID: 633977 • Letter: I

Question

In lab this week, one part was a Stability Sequence. with AgNO3 and NH3. In the conclusion it is asking me "explaining how a stability series works, include how the observations you made specifically illustrate the stability series for silver ions". We combined 1 mL of AgNO3 and 1mL NaOH. Centrifuged and discarded the supernatant. Added several drops of aqueous NaI. Centrifuged and discarded supernatant again. Added NH3 until solid dissolved. Added NaI until rxn was seen.


Basically I dont understand how the stability series works and how the observations illustrate the stability series for silver ions.

Explanation / Answer

Thestability Series refers to the relative stabilities of complexes formed by a metal ion. For high-spin complexes of the divalent ions of first-row transition metals, the stability constant for the formation of a complex follows the order

This order was found to hold for a wide variety of ligands.

There are three explanations that are quoted frequently to explain the series.

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