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Classification: AQA Paper 1
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Crash report
Chemistry 7404/1 June 2019
The exam emphasizes inorganic and physical chemistry concepts, including atomic structure, periodic trends, and chemical bonding. Topics include ion sizes, electronegativity, and bond enthalpy calculations. Analytical techniques such as time-of-flight mass spectrometry and isotopic abundance are explored. Quantitative tasks address equilibrium constants, molar mass determination of diprotic acids, and percentage uncertainties in experimental titrations. Reaction mechanisms involve oxidation-reduction equations and Group 2 reactivity trends. Practical applications include magnesium-based titanium extraction, heat transfer in combustion, and distinguishing compounds via chemical tests. Theoretical knowledge is assessed through electron configurations, ionization energy patterns, and molecular geometry with lone pairs.