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    神奇的紫甘藍作文500字

    發布時間:2018-06-05 01:44:52    作者:倪夢潔

      “太神奇了,太神奇了!”從403班傳出一陣陣聲音。究竟是什么讓他們這么大叫,快跟好奇的我一起去看看吧!

      我們來到403教室,看到章老師正在做一個實驗——紫甘藍變身。原來是這個實驗讓他們大叫神奇。

      我們看到章老師先把紫甘藍切成了一片片的,放在碗里,再把開水倒進去,把紫甘藍泡了半個小時,再把紫甘藍汁倒進了一個杯子里。接著老師又拿出了三個裝了白色液體的杯子,看起來這三個杯子里的白色液體都是一樣的,我想:老師葫蘆里賣的是什么藥啊?為什么要裝三杯一樣的液體呢?這時,我充滿疑惑,老師卻把紫甘藍汁慢慢倒入第一個杯子,里面的液體變成了淡紫色的,又把紫甘藍汁倒入第二個杯子,里面的液體變成了紅色,最后把紫甘藍汁倒入第三個杯子,里面的液體變成了綠色。“為什么看起來一樣的液體倒入紫甘藍汁之后的顏色不一樣呢?”我問。老師說:“被子里的液體變成淡紫色的是白開水,變成紅色的是白醋,變成綠色的是蘇打水。”

      我又問:“為什么醋倒入紫甘藍汁會變成紅色,蘇打水倒入紫甘藍汁會變成綠色?”老師說:“紫甘藍汁是酸堿指示劑,遇到酸性物質會變紅色,遇到堿性物質變綠色。”

      我今天明白了許多道理,真是收獲多多啊!我以后一定要觀察身邊的失去,這樣就會懂的更多的道理,明白更多的知識了。

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