初中必背化学公式如下:
1、镁在空气中燃烧:2Mg + O2 点燃 2MgO
2、铁在氧气中燃烧:3Fe + 2O2 点燃 Fe3O4
3、铝在空气中燃烧:4Al + 3O2 点燃 2Al2O3
4、实验室用双氧水制氧气:2H2O2 MnO2 2H2O+ O2↑
![](https://iknow-pic.cdn.bcebos.com/f7246b600c3387443fb17ee9430fd9f9d72aa02b?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
5、高温煅烧石灰石(二氧化碳工业制法):CaCO3 高温 CaO + CO2↑
6、水蒸气通过灼热碳层:H2O + C 高温 H2 + CO
7、焦炭还原氧化铁:3C+ 2Fe2O3 高温 4Fe + 3CO2↑
8、甲烷在空气中燃烧:CH4 + 2O2 点燃 CO2 + 2H2O
![](https://iknow-pic.cdn.bcebos.com/500fd9f9d72a6059fcaeb18f3a34349b023bbaed?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)