📚 KS3 CIE Word Equations: Answers | KS3 CIE 文字方程式答案
Word equations are a simple way to describe chemical reactions using the names of substances. This revision guide gives you clear answers, worked examples and common CIE KS3 question styles so you can check your understanding and improve your exam answers.
文字方程式是用物质名称描述化学反应的简单方法。本复习指南为你提供清晰的答案、解题示例和常见的 CIE KS3 题型，帮助你检查理解并提高考试答题质量。
1. What Is a Word Equation? | 什么是文字方程式
A word equation is a summary of a chemical reaction. It uses the names of the chemicals instead of formulas or symbols.
文字方程式是化学反应的概括。它使用化学物质的名称，而不是化学式或符号。
In every word equation, the starting chemicals are called reactants. The chemicals made at the end are called products.
在每个文字方程式中，起始的化学物质称为反应物。最后生成的化学物质称为生成物。
The reactants are written on the left of an arrow, and the products are written on the right. The arrow means reacts to form or produces.
反应物写在箭头的左边，生成物写在箭头的右边。箭头表示反应生成或产生。
Example: copper + oxygen → copper oxide. Reactants: copper and oxygen. Product: copper oxide.
示例：铜 + 氧气 → 氧化铜。反应物：铜和氧气。生成物：氧化铜。
2. Key Rules for Writing Word Equations | 书写文字方程式的关键规则
Always use chemical names in word equations, not symbols such as Cu or O₂, unless the question asks for a symbol equation.
在文字方程式中始终使用化学名称，而不是像 Cu 或 O₂ 这样的符号，除非题目要求写符号方程式。
Write the reactants before the arrow. If there are two reactants, separate them with a plus sign. Do the same for two or more products.
将反应物写在箭头之前。如果有两种反应物，用加号隔开。两种或更多生成物也同样处理。
Keep the same names on both sides of the arrow. Do not try to balance a word equation by changing a name or adding numbers.
箭头两边保持相同的名称。不要试图通过改变名称或添加数字来配平文字方程式。
Example: hydrogen + chlorine → hydrogen chloride. The plus sign separates the reactants, and the arrow shows the direction of change.
示例：氢气 + 氯气 → 氯化氢。加号将反应物隔开，箭头表示变化的方向。
3. Common Word Equations with Answers | 常见文字方程式及答案
Below are common CIE KS3 word equations. Check each answer and practise writing it from memory until you can recall it quickly.
以下是 CIE KS3 常见的文字方程式。检查每个答案，并练习默写，直到你能快速回忆出来。
Answer 1: hydrogen + oxygen → water.
答案 1：氢气 + 氧气 → 水。
Answer
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