Reacting Masses and Chemical Equations
Review the essentials and check your understanding after your teacher’s explanation.
Balance the atoms用原子数配平方程式
Use particle counts to see what a balanced equation means.
Complete this core task when your teacher assigns the topic. Use the short recall cards before class.按老师指定的知识点完成网页预习，周内用提示卡回忆；不是整章预习。
Choose a topic
Formulae and relative masses
Write ionic formulae and calculate relative molecular or formula masses.
Balanced and ionic equations
Balance equations, add state symbols and remove spectator ions.
Conservation and reacting masses
Use balanced equations to calculate reacting masses by proportion.
Composition and purity
Calculate percentage composition and purity, then choose the correct mass in a reaction.
Printable worksheets
Guided Worksheet
4 lessons × 40 minutes · Two printable pages per lesson, with worked examples and homework.
Download DOCX ↓Printable hint cards
Use a card when you need a starting step, then return to the question. Chapter 5 cards are on pages 7 of the collection. Print the relevant pages and cut out the cards you need.
Download hint cards DOCX ↓