All Quantitative chemistry and stoichiometry articles – Page 2

Resource

Crynodiad hydoddiannau a thitradiadau | Stribed strwythur | 14–16 oed

Helpwch y dysgwyr i ysgrifennu am grynodiad hydoddiannau a thitradiadau, gan ddefnyddio awgrymiadau ysgrifennu wedi’u sgaffaldio

Lesson plan

Practising calculations in chemistry | 14–16 years

Help your learners check or revise key calculations in chemistry using this lesson plan with scaffolded activities and worked examples

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Excess copper oxide | Johnstone’s triangle worksheets | 14–16 years

Explore the reaction of sulfuric acid with excess reactant copper oxide at three conceptual levels with Johnstone’s triangle

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Relative mass | Knowledge check | 14–16

Assess knowledge and understanding of relative mass with a higher and foundation worksheet

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Limiting and excess reactants (qualitative) | Developing understanding | 14–16 years

Introduce limiting and excess reactants using an analogy of ice cream and ice cream cones

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Amount of substance in moles | Knowledge check | 14–16

Assess learning of amount of substance measured in moles with this higher level worksheet

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Hafaliadau cemegol cytbwys | Stribed strwythur | 14–16 oed

Defnyddiwch yr awgrymiadau wedi’u sgaffaldio i helpu’r dysgwyr i gymhwyso eu dealltwriaeth o gydbwyso hafaliadau cemegol

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Balanced chemical equations | Structure strip | 14–16 years

Use scaffolded prompts to support learners to write about balanced chemical equations

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Masau adweithio a chyfeintiau nwy | Stribed strwythur | 14–16 oed

Defnyddiwch yr awgrymiadau sydd wedi’u sgaffaldio i gefnogi’r dysgwyr i ysgrifennu am fasau adweithio a chyfeintiau nwy

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Reacting masses and gas volumes | Structure strip | 14–16 years

Use scaffolded prompts to support learners to write about reacting masses and gas volumes

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Amount of substance in moles | In context | 14–16

Put amount of substance measured in moles into context with questions based on common practical experiments

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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 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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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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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

Tackle this key concept in quantitative chemistry with these teacher-tested tips

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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