250 prompts matching "How coal was formed, and the ranks of coal"
Practice set: Giant structures and simple molecular structures compared
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Practice set: Assigning oxidation numbers in compounds and in ions
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Exam practice: Identifying the species oxidised in a reaction
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Spot my mistake: Assigning an oxidation number without checking the overall charge
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Spot my mistake: Calling the oxidising agent the substance that is oxidised
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Real-life Nigeria: Redox in Nigerian bleaching and water treatment
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Chemistry at work: Redox reactions in batteries and cells
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Spot my mistake: Assuming every metal is hard and dense
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Exam practice: The tests that identify the common non-metal gases
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Real-life Nigeria: Electroplating and metal purification in Nigeria
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Exam practice: Electrolysis and electrochemistry reviewed
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Calculation practice: A mixed set of first-term SS2 chemistry calculations
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Chemistry at work: Preparing a revision plan for the SS2 first term
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Spot my mistake: Rinsing the burette with water before filling it
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Calculation practice: Preparing a solution of a stated concentration
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Real-life Nigeria: Back titration, and when it is used
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Practice set: Homogeneous and heterogeneous catalysis
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Calculation practice: Calculating rate from a graph of concentration against time
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Chemistry at work: Equilibrium in the contact process for sulphuric acid
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Exam practice: Solubility product and sparingly soluble salts
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