...
首页> 外文期刊>Journal of Chemical Education >'Magic Eraser' Flame Tests
【24h】

'Magic Eraser' Flame Tests

机译:“魔术橡皮擦”火焰测试

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

Demonstrations are an effective method to get students interested in and excited about chemistry. Flame tests for certain cations garner “oohs” and “aaahs” from the student audience. Recently, this Journal featured several variations on methanol-fueled flame tests (1–4). In seeking a safe way to show the flame tests for large audiences, we thought using a porous support material that would absorb the methanol solution would be ideal. Trials with balsa wood, soaked overnight in the methanol solutions, produced only the typical yellow flame of sodium when ignited. Similar yellow flames were obtained with pieces of cellulose sponge. Both the wood and sponge, of course, charred as the methanol burned away.
机译:示范是使学生对化学产生兴趣和兴奋的有效方法。某些阳离子的火焰测试获得了听众的“嘘”和““”声。最近,《华尔街日报》对甲醇燃烧的火焰测试进行了一些改动(1-4)。在寻求向广大观众展示火焰测试的安全方法时,我们认为使用能够吸收甲醇溶液的多孔支撑材料将是理想的选择。用轻木浸泡在甲醇溶液中过夜的试验在点燃时仅产生典型的钠黄色火焰。用纤维素海绵碎片获得类似的黄色火焰。当然,木头和海绵都会随着甲醇的燃烧而烧焦。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号