what are the chemicals used in artificial rain & when &where it started?
111984
The most common chemicals used in cloud seeding are silver iodide, calcium chloride, and dry ice (frozen carbon dioxide). Silver iodide is used primarily for hail supression in clouds formed in cold weather systems, whereas calcium chloride is used in warm weather systems. It was first started (discovered) in 1946 by Dr. Vincent J. Schaefer of the GE Lab and experiments in cloud seeding were first conducted that same year.
467833
In some countries, they spray the top of the clouds ("seed the clouds") with chemicals (AgI or AgCl).  This causes the small water droplets in the cloud to grow, and finally the drops are big and heavy enough to fall to the ground in the form of rain.\n\nThe reason for doing this could be that you really don't want rain in a certain area, and you think it is a better idea to make the potential rain clouds "release the rain" in another area, before they have moved with the wind to the area you want to protect.\n\nSo, the rain is not really artificial, but the cause of the rain is artificial.
439975
Acid rain is caused by the combustion of fossil fuels, primarily the burning of coal but gasoline combustion also contributes. Burning of fossil fuels produces nitrogen oxide and sulfur dioxide which after emission transform into Sulfate and nitrate particles which combine in the air to form sulfuric and nitric acids. These acids fall to the earth as rain or other precipitation and get deposited in lakes and rivers and soil. \nA short term solution to problems associated with acid rain is to add a buffer to lakes other water sources to neutralize the acid but this is an expensive and temporary solution. The best way to prevent acid rain is to reduce emissions of the harmful substances by reducing the combustion of fossil fuels and practicing energy conservation or using other cleaner energy sources, like wind or solar power.
883653
As it turns out, the smells people associate with rainstorms can be caused by a number of things. One of the more pleasant rain smells, the one we often notice in the woods, is actually caused by bacteria! Actinomycetes, a type of filamentous bacteria, grow in soil when conditions are damp and warm. When the soil dries out, the bacteria produces geosmin spores in the soil. When the soil is too hot, the bacteria are not able to tolerate the dessication, so it produces spores as survival strategies. The spores remain invulnerable for years and are resistant to dessication and heat. The wetness and force of rainfall kick these tiny spores up into the air where the moisture after a rain acts as an aerosol (just like an aerosol air freshener). The moist air easily carries the spores to us so we breathe them in. These spores have a distinctive, earthy smell we often associate with rainfall. Geosmine (dimethyl-9-decalols) is the microbial product found in the spores is responsible for this pleasant smell. \n\nAnother sort of smell is caused by the acidity of rain. Because of chemicals in the atmosphere, rainwater tends to be somewhat acidic, especially in urban environments. When it comes in contact with organic debris or chemicals on the ground, it can cause some particularly aromatic reactions. It breaks apart soil and releases minerals trapped inside, and it reacts with chemicals, such as gasoline, giving them a stronger smell. These reactions generally produce more unpleasant smells than bacteria spores, which is why the after-the-rain smell isn't always a good one.\n\nAnother after-the-rain smell comes from volatile oils that plants and trees release. The oil then collects on surfaces such as rocks. The rain reacts with the oil on the rocks and carries it as a gas through the air. This scent is like the bacteria spores in that most people consider it a pleasant, fresh smell.♥
631716
I think you are looking for this: \n\nhttp://www.cms-chemicals.com/
1046638
i don't really know about this but i'm fairly sure i can give a better answer than lrisjqoijgjr  \n\nyou could probably use a surfactant to break down the molecular attraction between the water molecules but this would leave pollution through the path of whatever you were using to travel through the water\n\nbut yeah not really practical but better than uingnpds
239062
Try this:\n\nhttp://www.google.com/search?hl=en&lr=&safe=active&q=daily+rainfall+year+2000\n\nBUT add in your location in the search box too.
264494
CO2 - H2O + CO2 <--> H2CO3  (very common, most rain is slightly acidic)\nThe 2 gases below form stronger acids\nNO2 - 2H20 + 4NO2 + O2 <--> 4HNO3\nSO3 - H2O + SO3 <--> H2SO4
7688
Actually, the micro-organisms in the soil emanate some gases when their lifeline, water reaches them. U dont need a rain for that smell. Water ur garden, u will start smellin it in 1 min.
374732
i think it may be that SO2 will react with water to give sulphurous acid (H2SO3).  This is the common acid found in acid rain.  The concentrated ammonia may be to neutralise the acid should it be formed from the SO2 leak.\n\nPossibly anyway....
692987
Ok... I was thinking of plastics...my bad..hehe\n\nHere`s some info I found\n\nToday Asia is the main source of natural rubber. Over half of the rubber used today is synthetic, but several million tonnes of natural rubber are still produced annually, and is still essential for some industries, including automotive and military.
979253
ladies nail polish, \n\nbasically any H2O repellents........\n\nOne shld know the composition of nail and make synthetic version of nail composition.....so that u wear it before u put on  ur clothes.....good during rainy seasons..........\n\nMost plastics......
529822
the "rain" is sulfuric acid.
924652
G'day Siva K,\n\nThank you for your question.\n\nIt is commonly called cloud seeding. It is normally done by using aircraft to place silver iodide or dry ice into potential rain clouds to increase the amount of rain. There are two types of suitable clouds for the process - cumulus and stratus.\n\nIt is widely used in China and Australia.\n\nI have attached sources for your reference.\n\nRegards
527182
The pH of acid rain can be anything less than the pH of normal rain, which actually tends to be around 5-6 (rather than 7 as you might expect).  There's no magic pH at which it becomes acid rain; it just depends on how much acid is around.  Sometimes the pH can be as low as 2, or even 1, other times it will be more like 3 or 4, it really just depends how much pollution there is.  If you want us to find the concentration of H+ in the acid rain, you have to tell us what pH you're thinking of!\n\nAs for the coffee thing, you should be able to figure that out yourself for any given pH using the formula pH = -log[H+] and solving for [H+].
440658
Synthetic rubber\n\n\nAny artificially produced substance that resembles natural rubber in essential chemical and physical properties can be called synthetic rubber. Such substances are produced by chemical reactions, known as condensation or polymerization, of certain unsaturated hydrocarbons. The basic units of synthetic rubber are monomers, which are compounds of relatively low molecular weight that form the building units of huge molecules called polymers.\n\nThe origin of synthetic-rubber technology can be traced to 1860, when the British chemist Charles Hanson Greville Williams determined that natural rubber was a polymer of the monomer isoprene, which has the chemical formula CH2:C(CH 3)CH:CH2. Many efforts were made during the next 70 years to synthesize rubber in the laboratory by using isoprene as the monomer. Other monomers also were investigated, and during World War I (1914-1918) German chemists polymerized dimethylbutadiene (formula CH2:C(CH3)C(CH 3):CH2) producing a synthetic rubber called methyl rubber, which was of limited usefulness.\n\nTypes of synthetic rubbers:\nOne of the first successful synthetic rubbers resulting from Carothers's research was neoprene, which is the polymer of the monomer chloroprene, chemical formula CH2:C(Cl)CH:CH2. The raw materials of chloroprene are acetylene and hydrochloric acid. Developed in 1931, neoprene has high resistance to heat and such chemicals as oils and gasoline. Neoprene is used in hose for conveying gasoline and as an insulating material for cables and in machinery.\n\nBuna Type Rubber : Used in World War 2\n\nIn 1935 German chemists developed the first of a group of synthetic rubbers called Buna, which is produced by copolymerization—that is, the polymerization of two monomers, called comonomers. The name Buna is derived from the initial letters of butadiene, used as one of the comonomers, and natrium (sodium), which was used as a catalyst. One of these products, Buna-N, uses acrylonitrile (CH2:CH(CN)) as the other comonomer. Acrylonitrile is produced from cyanide. Buna-N is valuable for uses requiring resistance to the action of oils or abrasion.\n\nDuring World War II a Buna-type rubber called GR-S (Government Rubber-Styrene) was designated as the general-purpose rubber for the U.S. war effort. The basic rubber produced by the present-day U.S. synthetic-rubber industry, GR-S is a copolymer of butadiene and styrene. The various grades of GR-S are classified in two categories, regular and cold, depending on the temperatures of copolymerization. Cold GR-S types, which exhibit superior properties, are prepared at 5° C (41° F); regular GR-S types are prepared at temperatures of 50° C (122° F). Cold GR-S is used to make longer-wearing tires for automobiles and trucks.
754229
Rain water but not acid rain water.  Since I don't get a lot of rain in my state I usually used purified water mixed with miracle grow.  If you want your plant to grow faster make sure you give it enough light as well.