0653.C12.3.01 — Describe and explain methods of separation and purification using: (a) . a suitable solvent (b) . filtration (c) . crystallisation (d) . sim: past paper questions
Real questions on 0653.c12.3.01 — describe and explain methods of separation and purification using: (a) . a suitable solvent (b) . filtration (c) . crystallisation (d) . sim
The newest 7 of 7 written questions. Open one to see it on the real paper.
- 0653/43 · October/November 2024 · Q2a(iii)[1]
The mixture in the flask at the end of the reaction contains unreacted solid zinc and aqueous zinc chloride. State how unreacted solid zinc is removed from this mixture.
See it on the paper → - 0653/43 · October/November 2024 · Q2a(iv)[2]
Describe how crystals of zinc chloride are obtained from aqueous zinc chloride.
See it on the paper → - 0653/61 · October/November 2023 · Q1a(ii)[2]
The student: step 8 filters the contents of each test-tube as shown in Fig. 1.2 filter paper containing contents of test-tube E filter paper containing contents of test-tube W apple juice Fig. 1.2 step 9 collects the juice in a measuring cylinder for 5 minutes. Fig. 1.3 shows the volume of juice collected in each measu...
See it on the paper → - 0653/62 · October/November 2023 · Q2d[2]
The reaction also produces a green solution. The student separates the green solution from the excess iron in the reaction mixture. Draw a labelled diagram of the assembled apparatus that the student uses. Label the residue and the filtrate.
See it on the paper → - 0653/32 · February/March 2023 · Q2a(iv)[1]
State the separation process that is used to remove unreacted magnesium from the reaction mixture.
See it on the paper → - 0653/33 · October/November 2022 · Q2a(iii)[1]
State one method of removing the iron filings from the mixture.
See it on the paper → - 0653/61 · May/June 2022 · Q3a(ii)[3]
The student separates the insoluble white precipitate from the reaction mixture. Draw a labelled diagram to show the assembled apparatus the student uses. Include labels for the precipitate and the filtrate.
See it on the paper →
What examiners said
In this question, there was an instruction to record the volume ‘to the nearest 0.5 cm3’. Therefore, the correct reading for the first volume was 41.0. A common incorrect answer was 41. However, most candidates correctly recorded the second volume as 18.5.
— Examiner report, October/November 2023, 0653/61 Q1(a)(ii) (Cambridge)
Most candidates identified filtration as the method of separation and attempted to draw the appropriate apparatus. There was a large variation in the quality of diagrams. A pencil and a ruler should be used for straight lines and the filter paper needed to be clearly distinguishable from the filter funnel with both labelled. A beaker or conical flask would be the most appropriate collecting vessel...
— Examiner report, October/November 2023, 0653/62 Q2(d) (Cambridge)
Filtration was stated successfully by most candidates. Common errors included distillation and evaporation. Both of these separation methods would remove the water but would leave the sodium chloride solid and the iron filings together and not separated.
— Examiner report, October/November 2022, 0653/33 Q2(a)(iii) (Cambridge)
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