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lavender_sky

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marine20082008

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06233053(金币+2): 谢谢参与 2012-02-12 12:47:51
淀粉溶液与碘化钾溶液遇到稀硫酸溶液应该变兰的!
https://lib.cqvip.com/qk/96493X/201104/37277964.html
是否配制的碘化钾溶液及所用碘化钾易被空气氧化,
每次取后应及时加盖。一旦变成黄色即不可再用。
地球围着太阳转,太阳围着我来转!
2楼2011-10-09 21:43:27
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