500 prompts matching "Calculating the mass crystallising out on cooling"
Exam practice: The pH scale and what it measures
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Practice set: Making an insoluble salt by mixing two solutions
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Calculation practice: Titration calculations and finding an unknown concentration
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Teach me: How the periodic table is arranged
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Calculation practice: Predicting a property from an element's position
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Real-life Nigeria: The alkali metals and the halogens as families
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Practice set: Fractional distillation and what it separates
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Real-life Nigeria: Separation methods in Nigerian salt and oil production
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Quiz me: The physical properties that make water unusual
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Practice set: Hard and soft water, and the causes of hardness
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Practice set: The properties and uses of oxygen
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Real-life Nigeria: Air pollution in Nigerian cities
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Chemistry at work: The uses of the gases separated from air
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Quiz me: Symbols, formulae and equations reviewed
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Calculation practice: A mixed set of second-term chemistry calculations
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Quiz me: Electrolytes and non-electrolytes
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Practice set: The electrolysis of acidified water
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Teach me: Oxidation and reduction in terms of oxygen
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Quiz me: Oxidation and reduction in terms of hydrogen
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Calculation practice: Balancing a redox equation by oxidation number
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