500 prompts matching "Working out the change in oxidation number"
Exam practice: Fertilisers and their effect on crop yield
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Spot my mistake: Assuming every chemical is harmful
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Exam practice: A full SS1 Chemistry paper under examination conditions
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Practice set: Cement production in Nigeria
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Exam practice: Fertiliser and how it is manufactured in Nigeria
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Project task: Researching a chemical plant near me
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Spot my mistake: Choosing decantation where filtration is needed
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Calculation practice: Calculating percentage recovery after a separation
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Project task: Separating sand from salt at home
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Practice set: Separating a mixture of two miscible liquids
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Exam practice: The fractional distillation of crude oil
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Spot my mistake: Using simple distillation on liquids with close boiling points
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Calculation practice: Reading a distillation temperature curve
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Project task: Building a simple distillation set-up
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Quiz me: Paper chromatography and how it is carried out
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Calculation practice: Calculating an Rf value from measurements
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Project task: Separating ink colours with paper chromatography
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Spot my mistake: Thinking isotopes of an element react differently
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Calculation practice: Calculating relative atomic mass from isotope abundances
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Exam practice: Ionisation and the formation of cations and anions
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