鹽酸(hydrochloric acid) 是氯化氫(HCl)的水溶液 ，工業(yè)用途廣泛。鹽酸的性狀為無(wú)色透明的液體，有強(qiáng)烈的刺鼻氣味，具有較高的腐蝕性。濃鹽酸(質(zhì)量分?jǐn)?shù)約為37%)具有極強(qiáng)的揮發(fā)性，因此盛有濃鹽酸的容器打開(kāi)后氯化氫氣體會(huì)揮發(fā)，與空氣中的水蒸氣結(jié)合產(chǎn)生鹽酸小液滴，使瓶口上方出現(xiàn)酸霧。鹽酸是胃酸的主要成分，它能夠促進(jìn)食物消化、抵御微生物感染。
hydrochloric acid is an aqueous solution of hydrogen chloride (HCl) and is widely used in industry. Hydrochloric acid is a colorless transparent liquid with a strong pungent odor and high corrosiveness. Concentrated hydrochloric acid (mass fraction of about 37%) is extremely volatile, so after the container containing concentrated hydrochloric acid is opened, the chlorinated hydrogen gas will volatilize, and combine with water vapor in the air to produce small hydrochloric acid droplets, so that acid fog appears above the bottle mouth. Hydrochloric acid is the main component of stomach acid, which promotes the digestion of food and protects against microbial infections.
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