Hydrogen fiuoride

Epoxide Opening with 70% Aqueous Hydrogen Fiuoride ... 

A blast of fiuorine gas on the shaved skin of a rabbit caused a second-degree burn lower concentrations cause severe burns of insidious onset resulting in ulceration, similar to those produced by hydrogen fiuoride. ... 

Table 1. Addition of Hydrogen Fiuoride to Halogenated Olefins...

Decide which species is the conjugate base of hydrogen fiuoride. 

Makino, K. Yoshioka, H. Selective fiuorination of ethyl l-methylpyrazole-4-carbox-ylates with poly(hydrogen fiuoride)-amine complex under electrolytic anodic oxidation. J. Fluorine Chem. 1988, 39, 435 0. 

Ionic liquids (ILs) also face the same purification problem. The traditional trace impurities are water, oxygen, and halide ions [25]. The less common impurities include the by-products of the hydrolysis of water-sensitive ions and also even the hydrogen fiuoride [26]. The water in various ILs based on the bis(trifluoromethylsulfonyl) imide (TFSI) anion can be removed by high-temperature evaporation (e.g., 24 h at 130°C) [25]. Otherwise, special attention should be paid to ILs with hydrophobic anions, in which a small amount of water in the ILs may benefit the long-term durability of the electrolyte [1]. 

Fluorine (F2) is obtained by the electrolysis of liquid hydrogen fiuoride (HF) containing potassium fluoride (KF). (a) Write the half-cell reactions and the overall reaction for the process, (b) What is the purpose of KF (c) Calculate the volume of F2 (in liters) collected at 24.0°C and 1.2 atm after electrolyzing the solution for 15 h at a current of 502 A. 

Mohring, W.R., and Hawley, M.C.. Gravimetric analysis of hydrogen fiuoride vapour adsorption by Bigtooth Aspen wood, Ind. Eng. Chem. Res., 28(2). 237-243 (1989). 

Hydrogen fiuoride can be prepared by the action of sulfuric acid on sodium fiuoride. Explain why hydrogen bromide cannot be prepared by the action of the same acid on sodium bromide. 

Allyl-2-Methoxyphenol 97-53-0 Ammonium Hydrogen Fiuoride 1341-49-7 Arsenic Acid 7778-39-4... 

---