Issue 38, 2021

Solubilities in aqueous nitrate solutions that appear to reverse the law of mass action

Abstract

Non-ideal aqueous electrolyte solutions have been studied since the start of the application of thermodynamics to chemistry in the late 19th century. The present study examines some of the most extreme non-ideal behavior ever observed: solubilities of alkali and NH4+ nitrate salts in water that appear to behave the opposite of how the Law of Mass Action would predict. A literature review discovered that the solubilities of NH4NO3 and many alkali nitrate salts increases when another nitrate-bearing electrolyte is added to solution. These occurrences were in concentrated solutions with insufficient water to provide all ions their preferred hydration number without sharing waters between ions. This water deficit results in the formation of contact ion-pairs as well as larger ion-clusters. These ion-clusters may be favored when there is more than one type of monovalent cation present.

Graphical abstract: Solubilities in aqueous nitrate solutions that appear to reverse the law of mass action

Associated articles

Article information

Article type
Perspective
Submitted
09 7月 2021
Accepted
16 9月 2021
First published
23 9月 2021

Phys. Chem. Chem. Phys., 2021,23, 21407-21418

Author version available

Solubilities in aqueous nitrate solutions that appear to reverse the law of mass action

Jacob. G. Reynolds, Phys. Chem. Chem. Phys., 2021, 23, 21407 DOI: 10.1039/D1CP03124D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements