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一查化学式:看反应物、生成物的化学式是否正确。化学式写错,就意味着没有那种物质及反应的存在。二查配平:若化学方程式没有配平,就违背了质量守恒定律。因此必须配平,使反应前后各元素的原子个数相等。三查条件:许多化学反应是在一定条件下进行的,若无条件,反应将无法进行。
Check the chemical formula: See if the chemical formula of the reactants and products is correct. Wrong chemical formulas mean that there is no such substance or reaction. Check the balance: If the chemical equation is not balanced, it violates the law of conservation of mass. Therefore, it must be balanced so that the number of atoms of each element before and after the reaction is equal. Three investigation conditions: Many chemical reactions are carried out under certain conditions. If there is no condition, the reaction will not proceed.