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学好初中化学,不仅要领略五彩缤纷的化学物质,令人心醉的化学变化,更要熟记物质的五颜(焰)六色。1.五种火焰颜色 苍白色火焰:H_2+Cl_2点火2HCl。 蓝色火焰:2CO+O_2点燃2CO_2 淡蓝色火焰:2H_2+O_2点火2H_2O;CH_4+2O_2点燃CO_2+2H_2O;S+O_2(空气)点燃SO_2。 蓝紫色火焰:S+O_2点燃SO_2。 黄色火焰:2Na+Cl_2点燃2NaCl。
To learn chemistry in junior high school, we must not only appreciate the colorful chemicals and fascinating chemical changes, but also must remember the five colors (flame) of the material. 1. Five flame colors Pale white flame: H_2+Cl_2 ignites 2HCl. Blue flame: 2CO+O 2 ignite 2CO 2 light blue flame: 2H_2+O 2 ignite 2H 2 O; CH 4+2O 2 ignite CO 2+ 2H 2 O; S+O 2 (air) ignite SO 2 . Blue-violet flame: S+O 2 ignites SO 2 . Yellow flame: 2Na+Cl 2 ignites 2NaCl.