omer uner
Classification: Unit 3
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Crash report
Chemistry WCH13/01 October 2021
1. Strontium compound identification–cation flame test, anion detection using barium chloride and silver nitrate, thermal decomposition feasibility, strontium nitrate breakdown products and tests
2. Geraniol functional group analysis–alcohol and alkene tests, steam distillation setup, separation with drying agent, safety precautions, flame test, hydrogenation reaction condition and product structure
3. Enthalpy change determination–hydration of anhydrous copper(II) sulfate, temperature-time graph, calorimetry data interpretation, source of error, Hess′s law application, feasibility of direct hydration measurement
4. Chemical clock investigation–reaction rate calculation from time-temperature graph, rate vs temperature trend, experimental repeat necessity, adjusting time interval through reagent concentration
5. Titration analysis–sodium hydroxide titration with HCl, titre table completion, anomaly exclusion rationale, concentration calculation, burette uncertainty, phenolphthalein endpoint color change
2. Geraniol functional group analysis–alcohol and alkene tests, steam distillation setup, separation with drying agent, safety precautions, flame test, hydrogenation reaction condition and product structure
3. Enthalpy change determination–hydration of anhydrous copper(II) sulfate, temperature-time graph, calorimetry data interpretation, source of error, Hess′s law application, feasibility of direct hydration measurement
4. Chemical clock investigation–reaction rate calculation from time-temperature graph, rate vs temperature trend, experimental repeat necessity, adjusting time interval through reagent concentration
5. Titration analysis–sodium hydroxide titration with HCl, titre table completion, anomaly exclusion rationale, concentration calculation, burette uncertainty, phenolphthalein endpoint color change