英語六級聽力訓練:振蕩反應

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★英語聽力頻道為大家整理的英語六級聽力訓練:振蕩反應,供大家參考。更多閱讀請查看本站英語聽力頻道。
    碘酸根離子,過氧化氫,丙二酸
    So iodate, hydrogen peroxide, malonic acid
    在硫酸存在的條件下
    in the presence of sulfuric acid
    反應生成這種化合物
    react to produce this compound
    氧氣和水
    oxygen and water
    不過像這樣考慮反應
    But think about the reaction this way
    無異于說金屬和塑料反應
    It's equivalent to saying that metal and plastic
    生成自行車
    react to produce a bicycle
    實際有很多步驟
    In reality, there are many steps
    發(fā)生在原材料和最終產(chǎn)品之間
    that occur between those raw materials and the finished results
    Briggs-Rauscher反應也是這樣
    and the Briggs-Rauscher reaction is similar
    這里需要有很多子反應發(fā)生
    Here are the many subreactions that occur
    才能從反應物
    to get from the reactants
    得到產(chǎn)物
    to the products
    我們所看到的是從無色到琥珀色到深藍色的循環(huán)
    What we see is a cycle from colorless to amber to dark blue
    隨著這些反應的進行
    And as these reactions run
    反應物和產(chǎn)物的相對濃度
    the relative amounts of the reactants and the products
    決定了溶液的顏色
    dictate the color of the solution
    I2是琥珀色的
    I2 is amber
    I-是無色的
    I minus is colorless
    而I3-在同淀粉溶液相互作用時是深藍色的
    and I three minus is deep blue when it interacts with starch in the solution
    三碘陰離子能在
    triiodide is formed when
    碘單質(zhì)和碘離子相互作用時形成
    iodine and iodide interact
    這個循環(huán)會一直持續(xù),直到反應物被耗完為止
    And this cycle continues until all the reactants are used up
    但愿大家喜歡這個視頻,下次再見
    Hope you enjoyed the video and I'll see you next time