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堿性加熱條件下,高錳酸鉀氧化海水中的需氧物質;酸性條件下,碘化鉀還原過量的高錳酸鉀和 生成的二氧化錳;硫代硫酸鈉標準溶液滴定生成的游離碘,采集反應液圖像并根據RGB值的變化, 判定滴定的終點。

五月天AV永久无码天堂影院
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