Chemistry 7405/2 June 2023

AQA A Level Chemistry (7405) Jun 2023

معلم موافق رایگان بودن است.

The exam evaluates organic and physical chemistry, focusing on reaction mechanisms, spectroscopy, and thermodynamics. Topics include the rate of reaction for organic acids with sodium hydrogencarbonate, activation energy, and rate-determining steps. Analytical methods explore IR and NMR spectroscopy for structure determination, including splitting patterns and chemical shifts. Organic synthesis addresses polymer formation, ester hydrolysis, and electrophilic substitution mechanisms. Thermodynamics covers enthalpy changes, calorimetry, and combustion of biofuels. Practical applications include testing organic liquids using oxidation and bromine water, fractional distillation, and gas syringe calibrations. The paper emphasizes quantitative reasoning, experimental skills, and applying theoretical chemistry in real-world contexts.