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Ammonium is a modified form of ammonia that has an extra hydrogen atom. It is a positively charged molecular ion with the chemical formula NH + 4 or [NH 4] +.It is formed by the addition of a proton (a hydrogen nucleus) to ammonia (NH 3).
The salts produced by the action of ammonia on acids are known as the ammonium salts and all contain the ammonium ion ([NH 4] +). [38] Although ammonia is well known as a weak base, it can also act as an extremely weak acid. It is a protic substance and is capable of formation of amides (which contain the NH − 2 ion).
In chemistry, ion association is a chemical reaction whereby ions of opposite electric charge come together in solution to form a distinct chemical entity. [1] [2] Ion associates are classified, according to the number of ions that associate with each other, as ion pairs, ion triplets, etc. Ion pairs are also classified according to the nature of the interaction as contact, solvent-shared or ...
NH4 or NH 4 or NH-4 may refer to: Ammonium, the cation NH + 4 in chemistry; National Highway 4 (India), new numbering for a National Highway in India;
Ammonium chloride is an inorganic chemical compound with the chemical formula N H 4 Cl, also written as [NH 4]Cl.It is an ammonium salt of hydrogen chloride.It consists of ammonium cations [NH 4] + and chloride anions Cl −.
Ammonium iodide is the inorganic compound with the formula NH 4 I. A white solid. It is an ionic compound, although impure samples appear yellow.This salt consists of ammonium cation and an iodide anion. [1]
The ammonium ion can be displaced with some concentrated nitrates e.g. potassium nitrate,, silver nitrate, etc.: [2] NH 4 ReO 4 + KNO 3 → KReO 4 ↓ + NH 4 NO 3. It can be reduced to nonahydridorhenate with sodium in ethanol: [2] NH 4 ReO 4 + 18Na + 13C 2 H 5 OH → Na 2 [ReH 9] + 13NaC 2 H 5 O + 3NaOH + NH 3 •H 2 O.
This technique is a branch of gaseous ion-molecule chemistry. [2] Reagent gas molecules (often methane or ammonia) [4] are ionized by electron ionization to form reagent ions, which subsequently react with analyte molecules in the gas phase to create analyte ions for analysis by mass spectrometry.