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所在平台: Udemy |
课程主页: https://www.udemy.com/course/balancing-of-chemical-equations/
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**课程名称：** 化学方程式配平 (Balancing of Chemical Equations) **课程概述：** 本课程旨在介绍化学反应的符号表示——化学方程式，以及为何必须配平化学方程式。核心在于解释化学方程式配平的重要性，即遵循质量守恒定律和恒比定律，确保反应物和生成物两侧每种元素的原子数量相等。 课程将详细讲解两种快速简便的配平化学方程式的方法：传统的配平方法和代数配平方法。 **关键概念：** * **化学方程式：** 用化学符号和式子表示化学反应，列出反应物和生成物的符号。 * **质量守恒定律：** 化学反应前后，原子的种类和数目保持不变。 * **恒比定律：** 化合物的组成是固定的，反应物和生成物两侧每种元素的原子数必须相等。 * **反应物：** 化学方程式中箭头左侧的物质。 * **生成物：** 化学方程式中箭头右侧的物质。 * **配平（stoichiometric coefficients）：** 在化学方程式中加入化学计量系数，以满足质量守恒定律。 **课程示例：** 课程将以氢气与氧气反应生成水为例，展示化学方程式的表示方法，即 2H₂ + O₂ → 2H₂O。
A chemical equation is the symbolic representation of a chemical reaction using the symbols and formulae of the substances involved in the reaction. It is important to balance chemical equations because there must be an equal number of atoms on both sides of the equation to follow the Law of the Conservation of Mass.Balancing chemical equations involves the addition of stoichiometric coefficients to the reactants and products. This is important because a chemical equation must obey the law of conservation of mass and the law of constant proportions, i.e. the same number of atoms of each element must exist on the reactant side and the product side of the equation.Two quick and easy methods of balancing a chemical equation are discussed in this article. The first method is the traditional balancing method and the second one is the algebraic balancing method.A chemical equation is a symbolic representation of a chemical reaction in which the reactants and products are denoted by their respective chemical formulae.An example of a chemical equation is 2H2 + O2 → 2H2O which describes the reaction between hydrogen and oxygen to form waterThe reactant side is the part of the chemical equation to the left of the ‘→' symbol whereas the product side is the part to the right of the arrow symbol.
