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用KMnO4法制备已二酸,怎样判断反应是否完全?若KMnO4过量将如何处理?
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用KMnO4法制备已二酸,怎样判断反应是否完全?若KMnO4过量将如何处理?
时间:2022-01-10 14:59
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大学试题
工学
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<p> 用玻璃棒蘸取少许反应液,在滤纸上点一下,如果高锰酸钾的紫色完全消失,说明反应已经完全。若KMnO4过量,可用少量NaHSO3还原。</p>
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