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1、常温下,钠与氧气反应生成氧化钠,化学方程式为:4Na+O2=2Na2O。 2、点燃条件下,钠与氧气反应生成过氧化钠,化学方程式为:2Na+O2=Na2O2。 当给钠加热或者点燃钠的时候,钠与氧气的反应会更剧烈,会生成过氧化钠(Na₂O₂)。 对应的化学反应方程式为:2Na + O_2 {或点燃} {===}Na_2O_2在这个反应中,我们能看到钠剧烈燃烧,发出黄色火焰,最后生成淡黄色的过氧化钠固体。 钠在空气中加热,会先熔化后燃烧,发出黄色火焰,生成一种淡黄色固体——过氧化钠。 方程式为:2na + o2 =加热= na2o2。 (钠在空气中燃烧也生成过氧化钠,不过反应条件要写“点燃”);钠常温下在空气中会发生缓慢氧化,生成氧化钠:4na + o2 = 2na2o。

在氧气中点燃:2Na+O₂=点燃=Na₂O₂ 钠与氧气反应现象:钠迅速熔化成小球,剧烈燃烧,发出黄色火焰,有少量黄色烟,生成淡黄色固体。 ### 钠和氧气点燃的化学方程式 在化学实验中,当金属钠(Na)与氧气(O₂)在点燃的条件下反应时,会生成一种白色的固体化合物——过氧化钠(Na₂O₂)。 加热或点燃时:$2Na+O_2 =Na_2O_2 (淡黄色固体)$ 2、钠和氧气反应现象:钠在空气中点燃时,迅速熔化为一个闪亮的小球,产生黄色火焰

理论上来说应该会有超氧化钠的生成,不过高中应该不会要求吧? 在空气中放置一段时间的钠(未完全变质)在点燃时涉及以下化学方程式:

钠和氧气反应现象:钠在空气中点燃时,迅速熔化为一个闪亮的小球,产生黄色火焰。 钠受热后,与氧气剧烈反应,发出黄色火焰生成淡黄色固体 过氧化钠,化学方程式为2Na+O₂点燃===Na₂O₂. 当氧气过量时,钠与氧气反应生成氧化钠,化学方程式为 Na + O2 → NaO2。 在氧气不足的情况下,钠与氧气反应生成亚氧化钠,化学方程式为 4Na + O2 → 2Na2O。 常温下就反应生成氧化钠(Na2O ),点燃条件下生成过氧化钠(Na2O2 ).条件是点燃,因为钠与氧气反应是钠在氧气中燃烧,所以是点燃不是加热.

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