All Quantitative chemistry and stoichiometry articles

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Concentration of acids | Johnstone’s triangle worksheets | 14–16 years

Learners connect their understanding of dissolved ions, concentration and how chemicals are labelled with this single-page worksheet

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Determining unknown concentration | Johnstone’s triangle worksheets | 14–16 years

Guide learners to connect their thinking about calculating unknown concentrations following a titration

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Concentration and moles | Developing understanding | 14–16 years

Support learners to develop secure mental models of how concentration is measured and calculated in mol/dm³

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Relative atomic mass of boron | Johnstone’s triangle worksheets | 14–16 years

Use Johnstone’s triangle to help learners think about relative atomic mass and the abundance of different isotopes

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Balanced chemical equations | Knowledge check | 14–16

Ready-to-use worksheets to assess learning of balancing chemical equations, foundation and higher level

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Balanced chemical equations and fuel | In context | 14–16

Put balancing chemical equations into context with questions based on fuels

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Fertiliser yield | Johnstone’s triangle worksheets | 14–16 years

Help learners calculate the actual and theoretical yield of ammonium sulfate using Johnstone’s triangle

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Yield | Developing understanding | 14–16 years

Part of the Johnstone’s triangle series, this resource includes teacher notes and a student worksheet to help learners understand the difference between actual and theoretical yield

CPD article

Teaching reacting masses at 14–16

2026-04-07T06:00:00Z

Turn balanced equations into real quantities students can measure

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Interpreting chemical equations for ionic compounds | Developing understanding | 14–16

Help your learners develop mental models of what is represented in balanced chemical equation for ionic compounds with this resource, including teacher notes and a student worksheet 

Class experiment

Determining the relative atomic mass of magnesium

In association with Nuffield Foundation

Use this practical to determine the relative atomic mass of magnesium using its reaction with hydrochloric acid

Class experiment

Finding the formula of copper(II) oxide

In association with Nuffield Foundation

Use this demonstration with your 14–16 learners to deduce the formula of copper(II) oxide by reducing it with methane

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Moles and volume | Developing understanding | 14–16 years

Deepen your learners’ understanding of the idea that equal volumes of gases contain an equal number of molecules with this worksheet

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Introducing chemical change | Key terms support | 11–14

Language support pack for Introducing chemical change, with key terms list, accessible glossary, Frayer models and unscrambling definitions

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Moles and mass | Developing understanding | 14–16 years

Develop understanding of the relationship between the mass of one mole, the number of moles and the mass of a substance

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Quantitative chemistry | Key terms support | 14–16

Language support pack for quantitative chemistry, with key terms list, accessible glossary, Frayer models and unscrambling definitions

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Reactant and product substances | Developing understanding | 11–14

Use these worksheets to secure and deepen your learners’ understanding of reactants and products in chemical changes

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Iron and sulfur reaction | Johnstone’s triangle | 11–14 years

Develop understanding of reactants and products at different conceptual levels using an iron and sulfur reaction as an example

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C, O and Co | Johnstone’s triangle | 11–14 years

Develop your learners’ understanding of symbols and formulas at different conceptual levels by comparing the symbolic representations of carbon monoxide and cobalt

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Relative mass | Structure strip | 14–16 years

Support learners to demonstrate their understanding of relative mass, using scaffolded writing prompts