Jessica asked in 科學及數學化學 · 1 decade ago

urgent---f.4 chem

I want to ask what "paraffin oil" is and why is it so unreactive?

Please answer in English.

1 Answer

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  • 子路
    Lv 6
    1 decade ago
    Favorite Answer

    paraffin oil = Kerosene

    石蠟油=煤油/火油/火水

    煤油(俗稱火水,舊稱火油)是一種通過對石油進行分餾後獲得的碳氫化合物的混合物。由於煤油的組成成分可以非常不同,因此不同地方產的煤油的特徵可能區分很大。比起汽油來煤油比較粘稠,也比較不易燃。其閃點在55至100°C之間。煤油蒸汽比空氣重得多,與空氣混合可能形成爆炸氣。在分餾石油時煤油的沸點在汽油和柴油之間,約在160至280°C。

    Since kerosene is chemically stable, it is used to store substances with redox tendencies within to prevent unwanted reactions, such as alkali metals. Kerosene is also used in the packaging and storage of White Phosphorus to prevent immediate combustion on contact with oxygen.

    Besides, kerosene can be used to store crystals. When a water-soluble crystal is left in air, dehydration may occur slowly. This makes the colour of the crystal become dull. Kerosene can therefore prevent the crystal contacting with air.

    It is used as a solvent and in conjunction with cutting oil as a thread cutting and reaming lubricant.

    It’s can protect the “reactant” from being reacted as it is a organic solvent(non-polar solvent). It can therefore pohibit the ioniztion of ionic substances(ionic substances dissolve in water to form mobile ions). The ionic substances mixed with non-polar solvent do not form mobile ions and hence many reaction can be stopped. It can protect metals as oxygen does not disolve in oil.

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