Part 2 of 3
Why do crystals appear as it cools?
explain
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explain: give reasons and connect them to evidence.
Match water and copper(II) sulfate to their destinations during gentle partial evaporation. Explain why the remaining solution becomes more concentrated.
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Scope and sources
Cambridge IGCSE Chemistry 0620 · 2026–2028 v2 · Original learning materials.
Saturation at a specified temperature; partial evaporation, cooling, filtration and blotting hydrated crystals from a prepared copper(II) sulfate solution. Primary12.1.3(d),12.4.1(c); bounded support for12.4.2. No salt synthesis, quantitative solubility or purity measurement.
Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.
Official Cambridge syllabus