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.
Another factor affecting the magnitude of ammonia volatilization is pH. NH3 (gaseous ammonia) and NH4+ (aqueous ammonium ion) are in equilibrium at a pH of about 9, with higher pH's forcing more NH4+ into the gas form that you can smell. Thus ammonia is rarely noticed if the pH is acidic , and adding lime to a pile will increase the ammonia odor.