Chemistry 7404 Paper 1 June 2021, AQA AS-Level Past Papers with Mark Schemes

AQA AS Level Chemistry (7404) Jun 2021

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The exam explores inorganic and physical chemistry, emphasizing atomic structure, periodic trends, and reaction mechanisms. Key topics include ionization energy, time-of-flight mass spectrometry, and redox equations. Practical applications involve stoichiometry in combustion reactions, titration calculations for sodium ethanoate, and enthalpy of combustion of alcohols. Analytical skills focus on Kc expression derivation, gas law applications, and testing ionic solutions. Molecular and ionic properties are explored through bond angles, boiling point trends, and molecular interactions. Group chemistry covers halogen reactions, Group 2 compounds, and equilibrium principles. Quantitative problem-solving integrates experimental design and theoretical analysis.