droxide and phosphoric acid to produce calcium phosphate and water:3Ca(OH)2 + 2H3PO4 -* Ca3(PO4)2 + 6H2OThe last detail is the reaction conditions. The temperature, humidity, and barometric pressure will affect the reaction. Even a slight change in any one of these could change the reaction. There are many branches of Chemistry that use chemical reactions, infact, almost all of them. Here are some examples. Photochemistry is one branch of chemistry that deals with chemical reactions. It has to do with the radiant energy of all kinds formed during chemical reactions. Photochemists will experiment with chemical reactions. They will perform reactions normally only possible at high temperatures in room temperature under ultra-violet radiation. The reaction rate can be controlled for observation by varying the intensity of the radiation. X-rays and gamma rays are commonly used in these procedures. The most important photochemical reaction is photosynthesis. Carbon-dioxide and water combine with chlorophyll as a catalyst to give off oxygen. Photochemical reactions are caused by photons that are given off by the light source. The reactant molecules absorb the photons and get excited. They are at such an excited state, they can decompose, ionize, cause a reaction with other molecules, or give off heat. Another science that uses chemical reactions is Biochemistry. They use them to produce products that a person either can't produce or cannot do as well as they should. The best example of this the production of insulin. It was first produced in very tiny beads until someone realized that the body does in a very similar way. The person was Robert B. Merrifeild. He was the first to urge scientists to study living systems for the answers to problems that could be solved with synthesizing chemical reactions in the body. This was actually the first step toward the development of bionics.Scientists today are still toying with chemical reactions. They a...
