447 prompts matching "Enthalpy change and its sign convention"
Exam practice: The configuration of an ion compared with that of its atom
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Chemistry at work: Periodicity in the design of new materials
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Spot my mistake: Using pressure in millimetres of mercury with R in SI units
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Exam practice: Solubility expressed in different units
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Spot my mistake: Reading a solubility curve without checking the units
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Calculation practice: Calculating the number of repeating units from molar mass
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Explain back: The flame test and the colours it gives
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Spot my mistake: Adding excess reagent too early and losing a precipitate
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Chemistry at work: Recording observations and inferences in the WAEC format
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Quiz me: Testing for carbonate and for hydrogencarbonate
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Explain back: Testing for sulphate and for sulphite
I have just studied testing for sulphate and for sulphite in my SS3 Chemistry class. Let m
Practice set: Testing for chloride, bromide and iodide
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Exam practice: Testing for nitrate and for nitrite
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Real-life Nigeria: Identifying a salt from combined cation and anion tests
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Teach me: The standard solution and the primary standard
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Quiz me: The correct use of the pipette and the burette
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Practice set: The titration curve and the equivalence point
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Exam practice: Recording and averaging concordant titres
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Calculation practice: Finding molarity from titre, volume and mole ratio
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Practice set: Iodine and thiosulphate titrations
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