A-LevelChemistryChemical energeticsMay/June 2024Paper 3 Q210 Marks
2 A sample of ammonium bromide has been accidentally mixed with another salt. A student suggests that the percentage purity of the ammonium bromide can be determined by measuring the change in temperature when a solution is prepared. The enthalpy change when the sample dissolves in water, ΔH, can then be calculated and compared with the literature value for ammonium bromide. You will carry out the student's experiment. FA 4 is ammonium bromide, NH4Br, mixed with another salt.
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