Latihan Soal Kimia Unas SMA 2012

>> Tuesday, October 4, 2011

There are three significant reasons to study chemistry. First, chemistry has an important practical application in society. The development of life-saving drugs is one, and a complete list would touch upon most areas of modern technology.
Finally, chemistry figures prominently in other fields, such as in biology, in the advancement of medicines. Chemistry in every field as a useful intellectual tool for making important decisions.
The role of chemistry in the prevailing society is of enormous benefits. Chlorine has become an important commercial chemical. Today chlorine has turned into the main eement of producing more then one thousand chlorine compounds, which are of great importance in chemical industry, producing Poly Vinyl Chloride (PVC) as plastics for pipes. Other Chlorine compound are used as bleaching agent, disinfectants, solvents, pesticides, refrigerants, flame retardant and drugs.
Cholera, typhoid fever and dysentery are dengerous diseases, transmitted through impure drinking water. All such water - borne diseases are all but eliminated from most of the part of the world, when water supplies are treated with chlorine which kill pathogenic (disease-causing) organism. Chemistry plays an important role in the modern world. For example food, synthetic, plastics, medecines, soap, detergents, cometics, fertilizers, glass and explosives are the major gift of chemistry.

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The applications of chemistry are much like the science itself, undergoing constant changes. chemistry is an extremely practical science of enviroment, providing our everyday needs of food, clothing and shelters. Using chemistry we have discovered pharmaceutical chemical that enhance potantials of harming our health or the environment. It is in our best interest as educated citizens and consumers to understand the profound effect, both positive and negative thats chemicals have on our lives.
We use fluoride compounds such as SnF2, Na2 PO4. F(Sodium fluoro phosphate) and NaF in our tooth pastes to protect and control tooth decay. It is a great beneficence of chemistry on the society.

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