454 prompts matching "Expecting boiling to remove permanent hardness"
Calculation practice: Working out relative molecular mass from a formula
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Real-life Nigeria: Reading chemical formulae on Nigerian packaging
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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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Teach me: What a chemical equation represents
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Quiz me: Word equations and chemical equations compared
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Explain back: The state symbols and what each of them means
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Practice set: Writing an equation from a described reaction
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Real-life Nigeria: Equations for reactions seen in Nigerian daily life
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Project task: Writing equations for ten familiar reactions
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Chemistry at work: Why balanced equations matter in industry
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Teach me: Ionic equations and what they leave out
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Explain back: Writing an ionic equation from a full equation
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Practice set: Ionic equations for precipitation reactions
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Calculation practice: Checking the charge balance in an ionic equation
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Real-life Nigeria: The ionic equations behind Nigerian water treatment
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Chemistry at work: Ionic equations in analytical work
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Teach me: The arrangement of the modern periodic table
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Quiz me: Periods, groups and blocks
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Practice set: Predicting valency from the group number
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