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A-level課程

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Edexcel A Level Chemistry:復習筆記5.3.4 Enthalpy of Solution

2022-09-20

Solution & Hydration Definitions Enthalpy of solution The?standard enthalpy change of solution (ΔHsol?)?is the enthalpy change when?1 mole?of an ionic substance?dissolves?in sufficient w...

Edexcel A Level Chemistry:復習筆記5.3.3 Polarising Power

2022-09-20

Polarisation of Ions Theoretical lattice energies assume a perfect ionic model where the ions are 100% spherical and the attractions are purely electrostatic So overall, there has a been a c...

Edexcel A Level Chemistry:復習筆記5.3.2 Born-Haber Cycles

2022-09-20

Born-Haber Cycles A?Born-Haber cycle?is a specific application of Hess’ Law for ionic compounds and enable us to calculate lattice enthalpy which cannot be found by experiment The basic prin...

Edexcel A Level Chemistry:復習筆記5.3.1 Lattice Energy

2022-09-20

Lattice Energy Lattice energy As with bond enthalpy,?lattice energy?(ΔHlatt?) can be expressed as a formation or dissociation process As a formation process, it is the enthalpy change when?1...

Edexcel A Level Chemistry:復習筆記5.2.8 Weak Acid - Strong Base Titration

2022-09-20

Weak Acid - Strong Base Titration In this example, strong sodium hydroxide, NaOH (aq), is being added to weak ethanoic acid, CH3COOH (aq) NaOH (aq) + CH3COOH (aq) →?CH3COONa (aq) + H2O (l) T...

Edexcel A Level Chemistry:復習筆記5.2.7 Buffers

2022-09-20

Action of a Buffer Solution A?buffer solution?is a solution which resists changes in pH when small amounts of acids or alkalis are added A buffer solution is used to keep the pH almost const...