500 prompts matching "Exam practice: The amines, and why they behave as weak bases"
Calculation practice: Calculating percentage recovery after a separation
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Project task: Separating sand from salt at home
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Quiz me: Simple distillation and what it separates
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Calculation practice: Reading a distillation temperature curve
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Chemistry at work: Distillation in the Nigerian refining industry
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Quiz me: Paper chromatography and how it is carried out
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Spot my mistake: Reading a chromatogram without marking the solvent front
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Calculation practice: Calculating an Rf value from measurements
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Real-life Nigeria: Chromatography in Nigerian food and drug testing
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Calculation practice: Calculating relative atomic mass from isotope abundances
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Chemistry at work: The historical models of the atom compared
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Spot my mistake: Giving an ion the same configuration as its parent atom
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Calculation practice: Deducing valency from a given configuration
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Quiz me: The symbols for the first thirty elements
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Spot my mistake: Writing a formula without balancing the charges
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Calculation practice: Working out relative molecular mass from a formula
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Project task: Making a reference card of symbols and radicals
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Chemistry at work: The international agreement behind chemical symbols
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Quiz me: Word equations and chemical equations compared
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Calculation practice: Checking that an equation balances by counting atoms
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