📚 IB & Edexcel Chemistry: Final Revision Checklist | IB与Edexcel化学：期末复习提纲
Whether you are sitting the IB Diploma or Edexcel A Level Chemistry exam, the final weeks before the assessment demand a structured, topic‑driven review. This checklist breaks the syllabus into manageable chunks, highlighting the core concepts, typical calculation types, and common pitfalls that appear across both curricula. Use it to self‑assess your understanding, prioritise weak areas, and build confidence through active recall and past‑paper practice.
无论你参加的是IB文凭还是Edexcel A Level化学考试，评估前的最后几周都需要有条理、按主题进行的复习。这份提纲将考纲拆解为易于掌握的小块，突出两个课程体系中共有的核心概念、典型计算类型和常见误区。用它来自我评估理解程度、优先处理薄弱环节，并通过主动回忆和真题练习建立信心。
1. Atomic Structure & Periodicity | 原子结构与元素周期律
Start by recalling the subatomic particles, their relative masses and charges, and the meaning of atomic number (Z) and mass number (A). Be able to write electron configurations using s, p, d notation for atoms and ions up to Zn (Edexcel) or through the first transition series (IB), and link the electron arrangement to the position of an element in the periodic table.
首先回忆亚原子粒子的相对质量与电荷，以及原子序数（Z）和质量数（A）的含义。要能用s、p、d符号书写原子和离子的电子构型，对于Edexcel要求到锌，IB则延伸到第一过渡系，并将电子排布与元素在周期表中的位置联系起来。
- Understand successive ionisation energies and how they provide evidence for electron shells and subshells.
- 理解逐级电离能及其如何为电子层和亚层提供证据。
- Explain trends in atomic radius, ionic radius, first ionisation energy and electronegativity across a period and down a group.
- 解释原子半径、离子半径、第一电离能和电负性在周期和族中的变化趋势。
- Relate the trend in melting point across Period 3 to structure and bonding (Na, Mg, Al metallic; Si giant covalent; P₄, S₈, Cl₂ molecular).
- 将第三周期元素熔点的变化趋势与结构和成键联系起来（Na、Mg、Al金属键；Si巨型共价；P₄、S₈、Cl₂分子晶体）。
2. Bonding & Structure | 化学键与结构
You must clearly distinguish ionic, covalent and metallic bonding, and for each describe the nature of the electrostatic attractions. Draw Lewis structures that obey the octet rule, and recognise exceptions such as BeCl₂, BF₃, SF₆ and radicals like NO₂. Apply VSEPR theory to predict electron‑pair geometry and molecular shape (linear, trigonal planar, tetrahedral, trigonal bipyramidal, octahedral, bent, trigonal pyramidal etc.), and state the associated bond angles.
你必须清楚地区分离子键、共价键和金属键，并描述每种键中静电引力的本质。要会画符合八隅律的Lewis结构，并识别例外情况，如BeCl₂、BF₃、SF₆和NO₂等自由基。应用VSEPR理论预测电子对几何构型和分子形状（直线形、平面三角形、四面体形、三角双锥形、八面体形、V形、三角锥形等），并说出相应的键角。
- Use electronegativity to determine bond polarity and overall molecular polarity; relate polarity to physical properties like solubility and boiling point.
- 用电负性判断键的极性和分子的整体极性；将极性与溶解度和沸点等物理性质联系起来。
- Explain the properties of giant ionic, giant covalent, simple molecular and metallic substances (melting point, electrical conductivity, malleability).
- 解释巨型离子、巨型共价、简单分子和金属单质的性质（熔点、导电性、延展性）。
- For Edexcel, include the concept of delocalised electrons and metallic bonding strength linked to nuclear charge and ion size. For IB, pay attention to resonance (e.g., NO₃⁻, CO₃²⁻, benzene) and formal charge.
- Edexcel需包含离域电子概念和金属键强度与核电荷及离子大小的关系。IB需关注共振（如NO₃⁻、CO₃²⁻、苯）和形式电荷。
3. Energetics & Thermochemistry | 能量学与热化学
All paths require mastering enthalpy changes: ΔH for formation, combustion, neutralisation, solution, hydration, atomisation and bond enthalpy. Be confident using Hess’s law diagrams and algebraic cycles. Remember: ΔH = Σ(products) – Σ(reactants) when using standard enthalpies of formation; the reverse for combustion.
所有课程都要求掌握焓变：生成焓、燃烧焓、中和焓、溶解焓、水合焓、原子化焓和键焓。要熟练使用盖斯定律图与代数循环。记住：用标准生成焓时ΔH = Σ(产物) – Σ(反应物)；用燃烧焓时则相反。
- Calculate bond enthalpies from average values, understanding that bond enthalpies can differ from actual values in specific molecules.
- 用平均键焓计算反应热，理解键焓与特定分子中实际键能可能有差异。
- scale up to ΔH in kJ mol⁻¹. Include the heat capacity of the calorimeter if required (IB).
- 进行量热法计算：q = mcΔT，并推算出ΔH（kJ mol⁻¹）。IB可能需要考虑量热计的热容。
- Discuss Born–Haber cycles for ionic compounds (IB and some Edexcel options), linking lattice enthalpy to ionic radius and charge.
- 讨论离子化合物的玻恩-哈伯循环（IB及部分Edexcel选修），将晶格焓与离子半径和电荷联系起来。
- Use entropy (ΔS) and Gibbs free energy (ΔG = ΔH – S) to predict feasibility; calculate the temperature where a reaction becomes spontaneous.
- 用熵变（ΔS）和吉布斯自由能（ΔG = ΔH – TΔS）预测反应可行性；计算反应自发进行所需温度。
4. Kinetics | 化学动力学
Collision theory and the Maxwell–Boltzmann distribution underpin all rate explanations. You need to interpret energy profiles showing activation energy (Eₐ) for catalysed and uncatalysed routes. For Edexcel, describe how changes in temperature, concentration, pressure and surface area affect the proportion of successful collisions; for IB, add quantitative treatment: the Arrhenius equation k = A e–Ea/RT, using its logarithmic form to calculate Eₐ or k from experimental data.
碰撞理论和麦克斯韦–玻尔兹曼分布是所有速率解释的基础。你需要解读显示催化与未催化途径活化能（Eₐ）的能量曲线。Edexcel要求描述温度、浓度、压强和表面积如何影响有效碰撞的比例；IB还需定量处理：阿伦尼乌斯方程k = A e–Ea/RT，利用其对数形式根据实验数据计算Eₐ或k。
- Draw and label Maxwell–Boltzmann curves, showing the shift in most probable energy with temperature and the effect on the number of molecules exceeding Eₐ.
- 绘制并标注麦克斯韦–玻尔兹曼分布曲线，显示最概然能量随温度的变化以及超过Eₐ的分子数量的影响。
- Explain the role of homogeneous and heterogeneous catalysts, with examples such as Fe in the Haber process and V₂O₅ in the Contact process. For IB, also link to atmospheric chemistry (ozone depletion catalysed by Cl• radicals).
- 解释均相和非均相催化剂的作用，举例：哈伯法中的Fe、接触法中的V₂O₅。IB还需联系大气化学（Cl•自由基催化臭氧分解）。
5. Chemical Equilibrium | 化学平衡
The dynamic nature of equilibrium and Le Chatelier’s principle are the conceptual anchors. Be precise when predicting the effect of temperature, pressure and concentration changes on the position of equilibrium, and explain the yield optimisation in industrial processes (Haber, Contact, ethene hydration). Always state that the equilibrium constant Kc (or Kp) is unaffected by concentration and pressure changes, but is temperature‑dependent.
平衡的动态本质和勒夏特列原理是概念锚点。在预测温度、压强和浓度变化对平衡位置的影响时要准确，并解释在哈伯法、接触法、乙烯水化等工业流程中如何优化产率。始终要说明平衡常数Kc（或Kp）不受浓度和压强变化影响，但随温度变化。
- Write Kc expressions from given equations, paying attention to states (omit solids and pure liquids). Calculate Kc, including initial/equilibrium moles and volume.
- 从给定方程式写出Kc表达式，注意物态（省略固体和纯液体）。计算Kc，包括起始/平衡物质的量和体积。
- and Kp: mole fraction × total pressure = partial pressure. For IB, the relationship ΔG° = –RT ln K is required, linking thermodynamics and equilibrium.
- Edexcel需处理分压和Kp：摩尔分数 × 总压 = 分压。IB要求掌握ΔG° = –RT ln K的关系，连接热力学与平衡。
6. Acids, Bases & pH | 酸、碱与pH
Both syllabi expect a firm grasp of Brønsted–Lowry definitions, conjugate acid–base pairs and the ionic product of water Kw. You must be able to calculate pH of strong acids, strong bases, and their mixtures; for weak acids and bases, use the Ka or Kb expression with approximations or the quadratic formula when necessary.
两个教学大纲都要求扎实掌握布朗斯特–劳里定义、共轭酸碱对和水的离子积Kw。你必须会计算强酸、强碱及其混合物的pH；对于弱酸和弱碱，使用Ka或Kb表达式，必要时用近似或二次方程。
- Derive and use pKa = –log₁₀ Ka; calculate pOH and convert to pH. For buffer solutions, apply the Henderson–Hasselbalch equation in flexible forms.
- 推导并使用pKa = –log₁₀ Ka；计算pOH并换算为pH。对于缓冲溶液，灵活使用亨德森–哈塞尔巴尔赫方程。
- Interpret pH titration curves for strong acid/strong base, weak acid/strong base, and weak base/strong acid combinations; select suitable indicators based on the steepest pH change.
- 解读强酸/强碱、弱酸/强碱和弱碱/强酸滴定曲线；根据pH突跃范围选择合适的指示剂。
- For IB, pay extra attention to polyprotic acids (e.g., H₂SO₄, H₃PO₄) and the successive Ka values.
- IB需特别关注多元酸（如H₂SO₄、H₃PO₄）及其逐级Ka值。
7. Redox Processes & Electrochemistry | 氧化还原与电化学
Assign oxidation states to every atom in a species, and use them to identify oxidising and reducing agents. Balance redox half‑equations under acidic conditions; IB may extend to basic conditions. Both courses require constructing full equations using the ion‑electron method.
为物质中每个原子分配氧化态，并用它们来判断氧化剂和还原剂。配平酸性条件下的氧化还原半反应；IB可能延伸到碱性条件。两个课程都需要使用离子–电子法构建完整的方程式。
- tandard electrode potentials (E°). Calculate standard cell potential: E°cell = E°(cathode) – E°(anode), and predict spontaneous direction.
- 将金属活动性顺序与标准电极电势（E°）联系起来。计算标准电池电动势：E°cell = E°(阴极) – E°(阳极)，并预测自发方向。
- Describe the construction and operation of a standard hydrogen electrode, and list factors that affect electrode potential (temperature, concentration, pressure).
- 描述标准氢电极的构造与操作，并列出影响电极电势的因素（温度、浓度、压强）。
- laws to calculate mass or volume of products: Q = It, and n(e⁻) = Q/F (F = 96500 C mol⁻¹).
- 利用竞争反应的概念解释熔融盐和水溶液的电解。应用法拉第定律计算产物的质量或体积：Q = It，及n(e⁻) = Q/F（F = 96500 C mol⁻¹）。
8. Periodicity of the Selected Blocks (s, p, d) | 有关s区、p区、d区元素的周期性
For IB students, Sections 3 and 13 provide a deep dive into transition metal chemistry: oxidation states, coloured complexes, magnetic properties, and the formation of complex ions with ligands. Edexcel students will meet similar ideas in the transition metals topic. Focus on electron configuration of d‑block ions, variable oxidation states, and the origin of colour (d‑d electron transitions).
IB学生在第3和第13单元深入学习过渡金属化学：氧化态、有色配合物、磁性和配离子形成。Edexcel学生将在过渡金属专题中遇到类似内容。重点关注d区离子的电子构型、可变氧化态和颜色的来源（d-d电子跃迁）。
- Write full electronic configurations for Cr, Cu and their ions, noting the special stability of half‑filled and fully‑filled d subshells.
- 书写Cr、Cu及其离子的完整电子构型，注意半满和全满d亚层的特殊稳定性。
- Explain ligand exchange, geometrical and optical isomerism in octahedral and square planar complexes.
- 解释八面体和平面正方形配合物中的配体交换、几何异构和光学异构。
- Calculate the total ΔH of hydration using Born–Haber cycles and heats of solution (IB).
- 利用玻恩-哈伯循环和溶解热计算总水合焓（IB）。
9. Organic Chemistry | 有机化学
The organic content is extensive. Master the systematic nomenclature (IUPAC) for alkanes, alkenes, halogenoalkanes, alcohols, aldehydes, ketones, carboxylic acids, esters, amines, amides and nitriles. Draw and interpret structural, displayed and skeletal formulas.
有机化学内容很多。掌握烷烃、烯烃、卤代烷、醇、醛、酮、羧酸、酯、胺、酰胺和腈的系统命名法（IUPAC）。会画并解读结构式、展示式和骨架式。
- Classify reaction types: addition, substitution (SN1/SN2 for IB and some Edexcel units), elimination, condensation, hydrolysis, oxidation, reduction, polymerisation.
- 分类反应类型：加成、取代（IB及Edexcel某些模块中的SN1/SN2）、消除、缩合、水解、氧化、还原、聚合。
- Define and identify electrophiles, nucleophiles, free radicals; draw curly‑arrow mechanisms for all key reactions.
- 定义并识别亲电试剂、亲核试剂、自由基；为所有关键反应绘制弯箭头机理。
- Prepare flowcharts linking functional group interconversions: alkene ↔ alcohol ↔ aldehyde ↔ carboxylic acid ↔ ester, etc., using specific reagents and conditions.
- 制作流程图连接官能团转化：烯烃↔醇↔醛↔羧酸↔酯等，并标明具体的试剂和条件。
- Explain stereochemistry: definitions of optical isomers, chiral centres, enantiomers and racemic mixtures; for IB, also include cisplatin and biological activity of enantiomers.
- 解释立体化学：光学异构体、手性中心、对映体和外消旋混合物的定义；IB还需包括顺铂和对映体的生物活性。
10. Organic Reaction Mechanisms (Deep Dive) | 有机反应机理（深入）
Both Edexcel and IB require detailed mechanisms. Practice the electrophilic addition of hydrogen halides and halogens to alkenes, explaining the stability of carbocation intermediates. For benzene (Edexcel and IB HL), know the nitration, Friedel–Crafts alkylation and acylation mechanisms, and the role of the delocalised π‑electron system.
Edexcel和IB都要求详细的机理。练习卤化氢和卤素对烯烃的亲电加成，解释碳正离子中间体的稳定性。对于苯（Edexcel及IB HL），掌握硝化、傅克烷基化和酰基化的机理，以及离域π电子体系的作用。
- Nucleophilic substitution: for primary halogenoalkanes, use SN2; for tertiary, SN1. Discuss rates and stereochemical outcomes. Include OH⁻, CN⁻, NH₃ as nucleophiles.
- 亲核取代：伯卤代烷用SN2；叔卤代烷用SN1。讨论速率和立体化学结果。包括OH⁻、CN⁻、NH₃作为亲核试剂。
- Elimination (E2) promoted by hot ethanolic KOH; recognise competition with substitution.
- 热乙醇KOH促进的消除反应（E2）；识别其与取代反应的竞争。
- Nucleophilic addition to carbonyls with HCN; condensation reactions between alcohols and acids/acid anhydrides to form esters and polyesters.
- HCN对羰基的亲核加成；醇与酸/酸酐的缩合反应生成酯和聚酯。
11. Analytical Techniques | 分析技术
y to identify functional groups from characteristic absorption ranges (e.g., C=O at 1700 cm⁻¹, O– dict splitting patterns, chemical shifts and integration traces; use the n+1 rule for spin–spin coupling. Combine all spectral data to solve structures.
解读质谱：识别分子离子峰（M⁺）和碎片峰以推断结构信息。使用红外光谱（IR）根据特征吸收范围识别官能团（如C=O在1700 cm⁻¹，醇和羧酸中的O–H）。对于质子核磁共振（¹H NMR），预测裂分模式、化学位移和积分曲线；使用n+1规则处理自旋-自旋耦合。综合所有波谱数据解析结构。
- For IB only, include high‑resolution ¹H NMR and X‑ray crystallography; for Edexcel, optional topics may cover chromatography.
- 仅IB需包括高分辨率¹H NMR和X射线晶体学；Edexcel选修可能涉及色谱。
- Describe how HPLC and gas chromatography work, and their use in qualitative and quantitative analysis.
- 描述高效液相色谱（HPLC）和气相色谱的工作原理，及其在定性和定量分析中的应用。
12. Practical Skills & Exam Strategy | 实验技能与考试策略
Both IB and Edexcel assess practical competencies. You should be able to design a fair test, identify independent/dependent/control variables, evaluate systematic and random errors, and calculate percentage uncertainty. Know how to justify the use of appropriate apparatus for titration, calorimetry, gravimetric analysis, and rate experiments.
IB和Edexcel都评估实验素养。你应会设计公平测试，识别自变量/因变量/控制变量，评估系统误差和随机误差，并计算百分不确定度。知道如何为滴定、量热、重量分析和速率实验选择并论证所需仪器。
- Practice calculations involving limiting reactants, percentage yield and atom economy – they appear in practically every paper.
- 练习涉及限量反应物、百分产率和原子经济的计算——它们几乎出现在每张试卷中。
- Read the stem of each question carefully. In extended‑response questions, plan short paragraphs that define key terms, give a chemical equation, and then explain the underlying concepts with a relevant example.
- 仔细阅读每个问题的题干。在长答题中，规划好段落：先定义关键术语，给出化学方程式，然后结合实例解释基本概念。
- Use past papers to time yourself. Aim to complete Section A quickly so you can spend more time on the structured questions. Always show your working; even a partially correct numerical step often earns credit.
- 用真题计时练习。目标快速完成A卷，为主观题留出更多时间。始终展示解题过程；即使部分数字步骤错误，通常也能得步骤分。
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