Bifluoride information

Ammonium bifluoride is the inorganic compound with the formula [NH4][HF2] or [NH4]F·HF. It is produced from ammonia and hydrogen fluoride. This colourless...

The bifluoride ion is an inorganic anion with the chemical formula [HF2]−. The anion is colorless. Salts of bifluoride are commonly encountered in the...

Potassium bifluoride is the inorganic compound with the formula K[HF2]. This colourless salt consists of the potassium cation (K+) and the bifluoride anion...

Sodium bifluoride is the inorganic compound with the formula Na[HF2]. It is a salt of sodium cation (Na+) and bifluoride anion ([HF2]−). It is a white...

fluorine, F2, by electrolysis of a solution of HF and potassium bifluoride. The potassium bifluoride is needed because anhydrous HF does not conduct electricity...

acid. Evaporation of the solution forms crystals of potassium bifluoride. The bifluoride on heating yields potassium fluoride: K 2 CO 3 + 4 HF ⟶ 2 KHF...

sours are fluoride-based, including ammonium silicofluoride, ammonium bifluoride, and hydrofluosilicic acid; glycolic acid is also used. The US Department...

absorb hydrogen fluoride to form a bifluoride salt. Fluorine is produced by the electrolysis of molten potassium bifluoride. This electrolysis proceeds more...

gives fluorine. Solutions of inorganic fluorides in water contain F− and bifluoride HF− 2. Few inorganic fluorides are soluble in water without undergoing...

difluoride The bifluorides contain the two fluorine atoms in a covalently bound HF2− polyatomic ion rather than as F− anions. Ammonium bifluoride Potassium...

HF molecules undergo homoassociation to form polyatomic ions (such as bifluoride, HF− 2) and protons, thus greatly increasing the acidity. This leads to...

solutions containing HF, sodium fluoride precipitates as the bifluoride salt sodium bifluoride (NaHF2). Heating the latter releases HF and gives NaF. HF...

a method for producing dry hydrogen fluoride by acidifying potassium bifluoride (KHF2). Unfortunately, pure hydrogen fluoride did not pass an electric...

Henri Moissan, a chemist in Paris, performed electrolysis on potassium bifluoride dissolved in anhydrous hydrogen fluoride, and successfully isolated fluorine...

hydrofluoric acid and formic acid at high pressure. It is also seen in the bifluoride ion [F−H−F]−. Much has been done to explain the symmetric hydrogen bond...

2021-01-18. Karplus, Martin (1954). A quantum-mechanical discussion of the bifluoride ion (PhD thesis). California Institute of Technology. Archived from the...

HCl− 2 ions – the latter, in any case, are much less stable than the bifluoride ions (HF− 2) due to the very weak hydrogen bonding between hydrogen and...

ammonium fluoride absorbs the gas to form the addition compound ammonium bifluoride. The reaction occurring is: NH4F + HF → NH4HF2 It sublimes when heated—a...

hydrogen fluoride such as can be obtained from the breakdown of ammonium bifluoride: MgO + [NH4]HF2 → MgF2 + NH3 + H2O Related metathesis reactions are also...

HBr− 2 ions – the latter, in any case, are much less stable than the bifluoride ions (HF− 2) due to the very weak hydrogen bonding between hydrogen and...

vary in strength from weak (1–2 kJ/mol) to strong (161.5 kJ/mol in the bifluoride ion, HF−2). Typical enthalpies in vapor include: F−H···:F− (161.5 kJ/mol...

very short hydrogen bond (114.5 pm) that is similar to the length in the bifluoride ion HF− 2 (114 pm). In aqueous solution the hydroxide ion forms strong...

voluntary consensus standard, ASTM D7202. The procedure uses dilute ammonium bifluoride for dissolution and fluorescence detection with beryllium bound to sulfonated...

devised a method to produce anhydrous samples from acidified potassium bifluoride; instead, he discovered that the resulting (dry) hydrogen fluoride did...

with a metal atom. Most other soluble salts of fluoride are in fact bifluorides, HF2–. Historically, there have been two main approaches to prepare...

temperatures (>800 °C) is inert, but dissolves easily in hot aqueous ammonium bifluoride (NH4HF2) or a solution of hot concentrated sulfuric acid (H2SO4) and ammonium...