The newest 5 of 5 written questions. Open one to see it on the real paper.
Which row describes aqueous sodium chloride in process 1 and the name of process 2?
See it on the paper →Suggest a method of obtaining a sample of the dry salt from this salt solution.
See it on the paper →Which method can be used to separate graphite from dilute nitric acid?
See it on the paper →Which graph shows how the temperature changes as the acid is being added to the alkali?
See it on the paper →Which method is used to make the solution crystallise?
See it on the paper →Evaporation and crystallisation were well known as possible methods for obtaining a sample of the dry salt from solution.
— Examiner report, February/March 2022, 0654/32 Q8(d)(ii) (Cambridge)
Many stronger candidates chose the incorrect D rather than the correct answer, C. They understood that a temperature increase can be measured in an exothermic reaction. However, they did not appreciate that the temperature in the mixture was measured until the acid had just neutralised the alkali, and that the mixture would only start to cool down after neutralisation when there would be no furthe...
— Examiner report, May/June 2019, 0654/11 Q17 (Cambridge)
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