Ammonium Salts

Ammonium salts are ionic compounds containing the ammonium ion, NH4+, paired with an anion, and they are important sources of nitrogen and versatile reagents in chemistry. They commonly form when ammonia accepts a proton from an acid, producing NH4+ and the corresponding conjugate-base ion; in water, many dissociate into mobile ions that influence solution pH and conductivity. Their properties depend on the anion and conditions such as temperature and solvent, enabling applications in fertilizers, buffer systems, chemical synthesis, and laboratory analysis. Studying ammonium salts also helps explain acid-base reactions, solubility, ion exchange, and the behavior of nitrogen-containing compounds.

Ammonium Salts - Related Videos

Education

JoVE Core - Chemistry

Determining the pH of Salt Solutions

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2020

The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...

Research

JoVE Journal - Bioengineering

Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization

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Cited by 23 •

2012

This article will describe the procedure for synthesizing a hydrophobically modified Nafion enzyme immobilization membrane and how to immobilize proteins and/or enzymes within the membrane and test their specific activity.

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

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Cited by 31 •

2015

We demonstrate the extraction of ammonium from an ammonium-rich stream using an electrochemical and a bioelectrochemical system. The reactor setup, operation and data analysis are discussed.

Responses to Salt Stress

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2020

Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients. Plant cell cytoplasm has a high solute concentration, which causes water to flow from the soil into the plant due to osmosis. However, excess salt in the surrounding soil increases the soil solute concentration, reducing the plant’s ability to take up water. High levels of...

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates

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Cited by 1 •

2016

This article describes construction of a series of hydrogen-bonding supramolecular clusters in crystals using primary ammonium triphenylacetates, which are recrystallized from non-polar solvents. This selective construction of the supramolecular clusters leads to effective systematical symmetric studies about a correlation between the supramolecular clusters and their components.

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