500 prompts matching "Ion exchange and the softening of water"
Practice set: The trend in ionisation energy down a group
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Exam practice: The trend in metallic and non-metallic character
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Real-life Nigeria: The alkali metals and the halogens as families
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Explain back: Evaporation, crystallisation and distillation
I have just studied evaporation, crystallisation and distillation in my SS1 Chemistry clas
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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Chemistry at work: The uses of the gases separated from air
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Teach me: Atomic structure and the mole concept reviewed
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Quiz me: Symbols, formulae and equations reviewed
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Spot my mistake: The errors most often made in second-term SS1 Chemistry
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Exam practice: The factors that determine which ion is discharged
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Spot my mistake: Assigning an oxidation number to the wrong atom
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Quiz me: Ionic bonding and how it forms
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Explain back: Covalent bonding and the electron pairs atoms share
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Exam practice: Metallic bonding and the properties it gives
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Project task: Modelling ionic and covalent structures
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Explain back: Activation energy and what it represents
I have just studied activation energy and what it represents in my SS1 Chemistry class. Le
Practice set: Enthalpy change and its sign convention
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Calculation practice: Calculating the heat evolved in a reaction
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Exam practice: Catalysts and how they work
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