(6分)某实验小组根据下图所示装置探究燃烧的条件,请回答问题。 (1)检查装置气密性后,燃烧匙中放入 用如图1所示装置探究萘熔化时温度的变化规律.请回答下列问题:...

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(1)稀盐酸或稀硫酸  将燃着的木条放到a处,木条熄灭  探究可燃物燃烧需要氧气
(2)白磷的温度达到着火点以上,溶液B与CO 2 反应使装置内压强减小,打开弹簧夹后空气进入了装置中      Na 2 CO 3 +2HCl==2NaCl+H 2 O+CO 2 ↑     4P + 5O 2   点燃   2P 2 O 5

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