Search results
Results From The WOW.Com Content Network
Cyanide is quantified by potentiometric titration, a method widely used in gold mining. It can also be determined by titration with silver ion. Some analyses begin with an air-purge of an acidified boiling solution, sweeping the vapors into a basic absorber solution. The cyanide salt absorbed in the basic solution is then analyzed. [47]
A hydrogen cyanide concentration of 100–200 ppm in breathing air will kill a human within 10 to 60 minutes. [71] A hydrogen cyanide concentration of 2000 ppm (about 2380 mg/m 3) will kill a human in about one minute. [71] The toxic effect is caused by the action of the cyanide ion, which halts cellular respiration.
Cyanogen is typically generated from cyanide compounds. One laboratory method entails thermal decomposition of mercuric cyanide: . 2 Hg(CN) 2 → (CN) 2 + Hg 2 (CN) 2 Or, one can combine solutions of copper(II) salts (such as copper(II) sulfate) with cyanides; an unstable copper(II) cyanide is formed which rapidly decomposes into copper(I) cyanide and cyanogen.
Lewis structure of a water molecule. Lewis structures – also called Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDs) – are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.
Cyanogen fluoride (FCN) is a toxic, colorless gas. [3] The linear molecule has a molecular mass of 45.015 gmol −1. [3] [5] Cyanogen fluoride has a boiling point of –46.2 °C and a melting point of –82 °C.
It may be prepared by the reaction of calcium cyanide and ammonium carbonate: [citation needed] Ca(CN) 2 + (NH 4) 2 CO 3 → 2 NH 4 CN + CaCO 3. In dry state, ammonium cyanide is made by heating a mixture of potassium cyanide or potassium ferrocyanide with ammonium chloride and condensing the vapours into ammonium cyanide crystals: [citation ...
The expected LD100 dose (human) for potassium cyanide is 200–300 mg while the median lethal dose LD50 is estimated at 140 mg. [17] People who killed themselves, were killed, or killed someone else using potassium cyanide include: Viktor Meyer, 19th-century German chemist, died by suicide in 1897 after taking cyanide [18]
Zinc cyanide is the inorganic compound with the formula Zn 2. It is a white solid that is used mainly for electroplating zinc but also has more specialized applications for the synthesis of organic compounds .