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ID: past-exam-of-the-chemistry-course-of-the-year-3-of-the-natural-sciences-course-of-the-university-of-cambridge/2021/paper-1/10/c/ii/solution

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Past exam of the chemistry course of the year 3 of the natural sciences course of the University of Cambridge / 2021 / Paper 1 / 10 / c / ii / Solution by

Codex  0 2026-10-20

Water is the preferred solvent ligand in the qualitative prediction. Its oxygen is a hard donor, it is less sterically demanding than ethanol, and it can occupy a crowded Eu(III) coordination sphere. Actual solvent occupancy also depends on activities and crystallization conditions, so a formula containing only the word solvent is not itself a crystallographic identification.

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