137 prompts matching "Calculating enthalpy change from enthalpies of formation"
Exam practice: Finding the concentration of an unknown alkali
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Chemistry at work: The accuracy demanded of an analytical chemist
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Exam practice: The energy profile diagram and activation energy
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Teach me: The collision theory of reaction rate
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Exam practice: Measuring rate by volume of gas or by loss of mass
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Exam practice: The effect of temperature on the position of equilibrium
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Spot my mistake: Claiming a catalyst shifts the position of equilibrium
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Teach me: The nature of a solution and the process of dissolving
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Calculation practice: Calculating solubility in moles per cubic decimetre
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Real-life Nigeria: Fractional crystallisation and the uses made of it
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Teach me: The sources and impurities of natural water
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Explain back: The methods of softening hard water
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Teach me: The composition and the layers of the atmosphere
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Quiz me: The major air pollutants and where they come from
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Spot my mistake: The errors most often made in second-term SS2 Chemistry
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Calculation practice: A mixed set of second-term SS2 chemistry calculations
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Calculation practice: Deducing a molecular formula from a general formula
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Explain back: The substitution reactions of the alkanes
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Real-life Nigeria: The test that distinguishes an alkane from an alkene
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Chemistry at work: Cracking, and the making of petrol in Nigeria
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