在试管中用稀硫酸溶解�许硫酸亚铁晶体再加入硝酸加热产生无色气体在试管口变为红棕色溶液由浅绿色变为棕黄色.1红棕色气体为 溶液显棕 Template




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tomski在试管中用稀硫酸溶解�许硫酸亚铁晶体再加入硝酸加热产生无色气体在试管口变为红棕色溶液由浅绿色变为棕黄色.1红棕色气体为 溶液显棕 coloring