Edexcel A Level Chemistry:复习笔记5.3.4 Enthalpy of Solution
Solution & Hydration Definitions Enthalpy of solution The standard enthalpy change of solution (ΔHsolꝋ) is the enthalpy change when 1 mole of an ionic substance dissolves in sufficient w...
Edexcel A Level Chemistry:复习笔记5.3.3 Polarising Power
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:复习笔记5.3.2 Born-Haber Cycles
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:复习笔记5.3.1 Lattice Energy
Lattice Energy Lattice energy As with bond enthalpy, lattice energy (ΔHlattꝋ) can be expressed as a formation or dissociation process As a formation process, it is the enthalpy change when 1...
Edexcel A Level Chemistry:复习笔记5.2.8 Weak Acid - Strong Base Titration
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:复习笔记5.2.7 Buffers
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...
2023AP物理C力学考试报名开启！社会考生如何报名？
9月19日，美国大学理事会College Board 宣布大陆2023年AP考试报名正式开启。在2022-23学年，大学理事会继续与Prometric合作管理国内的AP考试报名和考务工作。2022-23学年AP物理C力学考试可以正式报名了！ AP物理C...
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2022-23学年AP考试报名已开启，需要注意什么？
在2022-23学年，大学理事会继续与Prometric合作管理国内的AP考试报名和考务工作。2022-23学年AP考试报名已开启，以下是在Prometric管理考点参加 2023年 AP 考试的主要步骤。 重要时间节点 2022-09-19 至 2022-10-...
