The newest 8 of 8 written questions. Open one to see it on the real paper.
Astudent measures the melting point of a sample of sea water. The student finds that the melting point is between —2°C and —3°C. State why the melting point is not 0°C.
See it on the paper →The ionic compound sodium sulfate contains the ions Na + and SO 42– . Determine the formula of sodium sulfate. formula =
See it on the paper →The balanced symbol equation for the reaction is shown. Complete the state symbols in the equation.
See it on the paper →State when the reaction finished. time = minutes (i)
See it on the paper →Used as a solvent.
See it on the paper →Name the solvent in aqueous copper sulfate.
See it on the paper →Water, H 2 O, is a solvent. State the meaning of the term solvent.
See it on the paper →diagram shows the correct way to set up the apparatus?
See it on the paper →Occasionally, candidates tried unsuccessfully to include charges. However, most candidates could determine the correct formula.
— Examiner report, May/June 2025, 0654/42 Q7(a) (Cambridge)
The state symbols for carbon dioxide and calcium carbonate were generally recognised. The most common incorrect response was to use the state symbol (l) rather than (aq) for hydrochloric acid.
— Examiner report, May/June 2025, 0654/42 Q8(a) (Cambridge)
Most candidates could interpret the graph to give a correct time.
— Examiner report, May/June 2025, 0654/42 Q8(b)(i) (Cambridge)
Past papers, syllabus and examiner reports © UCLES (Cambridge University Press & Assessment). Questions are matched to topics from the official syllabus. AssessPro is independent and not endorsed by Cambridge.