All articles by Helen Harden – Page 2

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Moles of xenon | Johnstone’s triangle worksheets | 14–16 years

Introduce Johnstone’s triangle as a method of calculating the number of moles of xenon from a given volume of gas
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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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Moles of gold | Johnstone’s triangle worksheets | 14–16 years

Connect macroscopic, sub-microscopic and symbolic understanding of calculations involving moles and mass with Johnstone’s triangle
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Molau o aur | Taflenni gwaith triongl Johnstone | 14–16 oed

Cysylltu dealltwriaeth facrosgopig, is-ficrosgopig a symbolaidd o gyfrifiadau sy’n cynnwys molau a màs â thriongl Johnstone
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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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Molau a màs | Datblygu dealltwriaeth | 14–16 oed

Datblygu dealltwriaeth o’r berthynas rhwng màs un môl, nifer y molau a màs sylwedd
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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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Interpreting chemical equations | Developing understanding | 14–16 years

Deepen learners’ understanding of interpreting chemical equations by exploring the topic at different conceptual levels
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Dehongli hafaliadau cemegol | Datblygu dealltwriaeth | 14–16 oed

Dyfnhau dealltwriaeth dysgwyr o ddehongli hafaliadau cemegol drwy archwilio’r pwnc ar wahanol lefelau cysyniadol
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Balancing chemical equations using hydrogen and oxygen | Johnstone’s triangle worksheets | 14–16 years

Introduce Johnstone’s triangle to help learners gain a deeper understanding of balancing chemical equations
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Cydbwyso hafaliadau cemegol sy’n defnyddio hydrogen ac ocsigen | Taflenni gwaith triongl Johnstone | 14-16 oed

Cyflwyno triongl Johnstone i helpu’r dysgwyr i ddyfnhau eu dealltwriaeth o gydbwyso hafaliadau cemegol
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Concentration and mass | Developing understanding | 14–16 years

Encourage learners to deepen their understanding of concentration and mass from the macroscopic to sub-microscopic level
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Crynodiad a màs | Datblygu dealltwriaeth | 14–16 oed

Annog y dysgwyr i ddyfnhau eu dealltwriaeth o grynodiad a màs o’r lefel facrosgopig i’r lefel is-ficrosgopig
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Crynodiad sodiwm hydrocsid | Taflenni gwaith triongl Johnstone | 14–16 oed

Meddwl am hydoddiant sodiwm hydrocsid (NaOH) ar lefel facrosgopig, is-ficrosgopig a symbolaidd
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Concentration of sodium hydroxide | Johnstone’s triangle worksheets | 14–16 years

Think about sodium hydroxide (NaOH) solution at a macroscopic, sub-microscopic and symbolic level
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Reacting ratios: masses | Developing understanding | 14–16 years

Develop learners’ understanding of the ratio of the very large number of atoms or molecules in balanced chemical equations
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Cymarebau adweithio: masau | Datblygu dealltwriaeth | 14–16 oed

Datblygu dealltwriaeth dysgwyr o gymhareb y nifer mawr iawn o atomau neu foleciwlau mewn hafaliadau cemegol cytbwys
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Echdynnu tun o dun ocsid | Taflenni gwaith triongl Johnstone | 14–16 oed

Cyflwyno cyfrifiadau gan ddefnyddio masau sy’n adweithio yng nghyd-destun echdynnu tun o dun ocsid
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Extracting tin from tin oxide | Johnstone’s triangle worksheets | 14–16 years

Introduce calculations using reacting masses in the context of extracting tin from tin oxide