Define enthalpy change of solution, $$$\Delta H_{\text {sol }}^{\ominus}$$$. ............................................................................................................................................... . .........................................................................................................................................

Chemistry

IGCSE&ALevel

CAIE

Exam No：9701_s24_qp_43 Year：2024 Question No：4(c)

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28.3.1 define and use the terms degenerate and non-degenerate d orbitals

28.3.2.1 octahedral complexes, two higher and three lower d orbitals

28.3.2.2 tetrahedral complexes, three higher and two lower d orbitals

28.3.3 explain why transition elements form coloured compounds in terms of the frequency of light absorbed as an electron is promoted between two non-degenerate d orbitals

28.3.4 describe, in qualitative terms, the effects of different ligands on Δ E, frequency of light absorbed, and hence the complementary colour that is observed

28.3.5 use the complexes of copper(II) ions and cobalt(II) ions with water and ammonia molecules and hydroxide and chloride ions as examples of ligand exchange affecting the colour observed

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