A rough & ready method involves memorising three numbers â 3, 5 and 8 â and the fact that 1 km in miles is approximately equal to the first of these numbers divided by the second, or alternatively the second divided by the third. That is: 1 km â 3/5 or 5/8 miles.
Ammonium chloride solutions with ammonia are used as buffer solutions. In paleontology, ammonium chloride vapor is deposited on fossils, where the substance forms a brilliant white, easily removed and fairly harmless and inert layer of tiny crystals.
The ammonium ion is generated when ammonia, a weak base, reacts with BrÃ¸nsted acids (proton donors): The ammonium ion is mildly acidic, reacting with BrÃ¸nsted bases to return to the uncharged ammonia molecule: Thus, treatment of concentrated solutions of ammonium salts with strong base gives ammonia. When ammonia is dissolved in water, a tiny amount of it converts to ammonium ions: The degree to which ammonia forms the ammonium ion depends on the pH of the solution.