Методическая разработка по английскому языку для студентов факультета химии и химической технологии " Simple Chemistry" Алматы 2017
Ex. 7 Read and translate the text
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мет. разработка по химии
| Ex. 7 Read and translate the text
What is salt? In chemistry, a salt is an ionic compound that results from the neutralization reaction of an acid and a base. Salts are composed of cations (positively charged ions) and anions (negative ions) so that the product is electrically neutral (without a net charge). These ions can be inorganic, such as chloride, or organic, such as acetate; and can be monatomic, such as fluoride, or polyatomic, such as sulfate There are several varieties of salts. Salts that hydrolyze to produce hydroxide ions when they are dissolved in water are basic salts, whilst those that hydrolyze to produce hydronium ions in water are acidic salts. Neutral salts are those that are neither acid nor basic salts. Zwitterions contain an anionic centre and a cationic centre in the same molecule, but are not salts. Examples of zwitterions include amino acids, many metabolites, peptides, and proteins. Usually, non-dissolved salts at standard temperature and pressure are solid. Molten salts and solutions which contain dissolved salts (e.g., sodium chloride in water) are called electrolytes, as they can conduct electricity. As observed in the cytoplasm of cells, in blood, urine and mineral waters, mixtures of many different ions in solution usually do not form defined salts after evaporation of the water. Vocabulary a positively charged ion положительно заряженный ион a negative charge отрицательный заряд electrically neutral электронейтральный without без inorganic неорганический chloride хлорид acetate ацетат monatomic одноатомный polyatomic полиатомный fluoride фторид several несколько variety вид to hydrolyze гидролизовать hydroxide ions ионы гидроксида to produce образовывать basic salts основные соли whilst в то время как acidic salts кислые соли hydronium ion ион гидрония, гидроний neutral salts нейтральные соли zwitterion цвиттер-ион anionic анионный cationic катионный a center центр amino acids амино кислоты a metabolite метаболит a peptide пептид a protein белок electrolyte электролит as так как as observed как наблюдается cytoplasm цитоплазма a cell клетка blood кровь urine моча defined определенные evaporation испарение to pour наливать жүктеу/скачать 422,31 Kb. Достарыңызбен бөлісу:
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