A-LevelChemistryChemical energeticsOct/Nov 2018Paper 3 Q125 Marks
In this experiment you will determine the percentage purity of a sample of impure anhydrous sodium carbonate. You will use two different methods to measure the enthalpy change of reaction when a sample of impure anhydrous sodium carbonate reacts with excess dilute hydrochloric acid. FA 1 is a sample of the impure anhydrous sodium carbonate. FA 2 is 2.00 mol dm⁻³ hydrochloric acid, HCl. FA 3 is a second sample of the impure anhydrous sodium carbonate used in FA 1.
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