چرا اسید دستان شما را می سوزاند ؟
دوشنبه 31 فروردین 1388 12:28 PM
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Why acid can burn your hands?
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چرا اسید دستان شما را می سوزاند ؟
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Some acids burn because they have a strong tendency to absorb water. In the
process,they give off a lot of heat. Since most living cells contain water, the strong acids
react whit them and kill the cells, causing very serious burns. Hydrochloric acid,
sulphuric acid and nitric acid are all very strong and very dangerous. These are called
inorganic acids since they are made from non-living material. Most organic acids, or
acids which occur naturally, are relatively weak. Vinegar and lemon juice are organic
acids.
People handling acids in industry wear special clothing and eye protection. If you handle
acids in your chemistry laboratory, you too should be careful. If water and acid are to
be mixed, you must pour the acid slowly into water and never the water into acid.
If acid splashes on your skin, wash with water and then with a weak ammonia solution.
If your eyes are affected, flush them with water and then with a soda bicarbonate
solution.
tendency : inclination, leaning, partiality گرايش، تمايل
react : respond, act in response to a stimulus; answer, reply واکنش نشان دادن
inorganic : not organic, inanimate, not having the structure and composition of living
organisms غير الى ،معدنى
occur : happen, take place, transpire; come to mind, suggest
itself رخ دادن ،اتفاق افتادن
splashes : dash a liquid, spatter, spray; wet or mark by spattering with a liquid; move
through a liquid and scatteror dash it about; be spattered; mark with contrasting
colors; display ,conspicuously ترشح كردن, ريختن
soda : soda water, carbonated water; sweet carbonated beverage; drink made with
soda water combined with syrup and ice cream; any of a number of sodium
compounds; sodium قليا،جوش شيرين,
سودا
