The newest 6 of 6 written questions. Open one to see it on the real paper.
Which reaction mixture gives these products?
See it on the paper →Which aqueous substances form a white precipitate when they are mixed?
See it on the paper →Identify solution X.
See it on the paper →Complete Fig. 9.1.
See it on the paper →The student repeats the procedure but this time uses 20 drops of aqueous copper( II ) sulfate instead of solution G. Describe what the student observes in the test-tube.
See it on the paper →The student repeats the experiment in (a) using sulfuric acid. The marble chips do not produce very much gas and stop bubbling after only 2 minutes. The word equation for this reaction is shown. calcium carbonate + sulfuric acid calcium sulfate + carbon dioxide + water The teacher says this is because the calcium sulfa...
See it on the paper →Candidates found this demanding. Generally, candidates were unfamiliar with the products of the electrolysis of concentrated sodium chloride.
— Examiner report, October/November 2023, 0653/31 Q8(b)(ii) (Cambridge)
Most candidates successfully completed the electromagnetic spectrum.
— Examiner report, October/November 2023, 0653/31 Q9(a)(i) (Cambridge)
The formation of a blue precipitate by copper(II) ions was very well known.
— Examiner report, February/March 2023, 0653/62 Q2(b)(iii) (Cambridge)
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