{"id":7117,"date":"2026-09-08T17:56:21","date_gmt":"2026-09-08T16:56:21","guid":{"rendered":"https:\/\/www.onlinelearningsystem.net\/xyz\/?page_id=7117"},"modified":"2026-09-10T20:57:56","modified_gmt":"2026-09-10T19:57:56","slug":"ocr-a","status":"publish","type":"page","link":"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/ocr-a\/","title":{"rendered":"OCR A"},"content":{"rendered":"\n<div class=\"ols-ocra-page\">\n\n  <style>\n    @import url('https:\/\/fonts.googleapis.com\/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');\n\n    .ols-ocra-page,\n    .ols-ocra-page * { box-sizing: border-box; }\n\n    .ols-ocra-page {\n      --ols-purple: #0a5740;\n      --ols-purple-2: #0f6e56;\n      --ols-accent: #2fbf8a;\n      --ols-accent-2: #7c2d12;\n      --ols-soft-purple: #ecfdf5;\n      --ols-soft-purple-2: #d1fae5;\n      --ols-ink: #052e22;\n      --ols-muted: #4b5f57;\n      --ols-soft: #fbf7f2;\n      --ols-soft-2: #ecfdf5;\n      --ols-white: #ffffff;\n      --ols-border: rgba(59, 7, 100, 0.13);\n      --ols-shadow: 0 18px 45px rgba(59, 7, 100, 0.13);\n      --ols-shadow-soft: 0 10px 28px rgba(59, 7, 100, 0.09);\n      --ols-radius: 26px;\n      --ols-container: 1180px;\n\n      font-family: \"Poppins\", Arial, sans-serif;\n      color: var(--ols-ink);\n      background:\n        radial-gradient(circle at top left, rgba(16, 185, 129, 0.09), transparent 32%),\n        linear-gradient(180deg, #ffffff 0%, #ffffff 100%);\n      overflow: hidden;\n    }\n\n    .ols-ocra-page a { color: inherit; 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}\n    }\n\n    @media (max-width: 640px) {\n      .ols-ocra-unit-row { grid-template-columns: 1fr; gap: 10px; }\n      .ols-ocra-unit-label { flex-direction: row; border-radius: 14px; min-height: auto; padding: 12px 16px; justify-content: flex-start; text-align: left; gap: 10px; }\n      .ols-ocra-topics-wrap { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }\n      .ols-ocra-topic-chip { width: 100%; min-width: 0; max-width: none; }\n      .ols-ocra-topic-chip:last-child:nth-child(odd) { grid-column: 1 \/ -1; }\n    }\n\n    @media (max-width: 460px) {\n      .ols-ocra-hero h1 { font-size: 42px; }\n      .ols-ocra-choice-card { padding: 28px 22px; }\n      .ols-ocra-faq-question { min-height: 76px; padding: 20px; grid-template-columns: minmax(0, 1fr) 32px; gap: 14px; font-size: 14px; }\n      .ols-ocra-faq-icon { width: 32px; height: 32px; }\n      .ols-ocra-faq-answer-inner { padding: 16px 20px 22px; }\n    }\n  <\/style>\n\n  <!-- BREADCRUMB BAR -->\n  <div class=\"ols-ocra-breadcrumb-bar\">\n    <div class=\"ols-ocra-container\">\n      <nav class=\"ols-ocra-breadcrumb\" aria-label=\"Breadcrumb\">\n        <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/\">Revision Notes<\/a> \/\n        <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/\">A Level Chemistry<\/a> \/\n        <span>OCR A<\/span>\n      <\/nav>\n    <\/div>\n  <\/div>\n\n  <!-- TOPIC NAVIGATOR -->\n  <section class=\"ols-ocra-navigator\">\n    <div class=\"ols-ocra-container\">\n      <div class=\"ols-ocra-nav-intro\">\n        <div class=\"ols-ocra-nav-eyebrow\">OCR A Level Chemistry A (H432)<\/div>\n        <h2 class=\"ols-ocra-nav-heading\">Revision Notes by Specification Reference<\/h2>\n        <p class=\"ols-ocra-nav-sub\">Select a specification section to access structured OCR revision notes, practical links and exam practice as pages are released.<\/p>\n      <\/div>\n      <div id=\"ols-ocra-units-container\"><\/div>\n      <div class=\"ols-ocra-nav-legend\">\n        \n        <div class=\"ols-ocra-nav-legend-item\"><span class=\"ols-ocra-nav-legend-dot ols-legend-soon\"><\/span>Coming soon<\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- HERO -->\n  <section class=\"ols-ocra-hero\">\n    <div class=\"ols-ocra-container\">\n      <div class=\"ols-ocra-hero-grid\">\n        <div class=\"ols-ocra-hero-copy\">\n          <div class=\"ols-ocra-eyebrow\">Introduction<\/div>\n          <h1>OCR A<br>A Level<br>Chemistry<\/h1>\n          <p class=\"ols-ocra-hero-lead\">\n            OCR A Level Chemistry A (H432) is a linear qualification assessed at the end of the two-year course. The content is organised into six modules: practical skills, foundations in chemistry, the periodic table and energy, core organic chemistry, physical chemistry and transition elements, and organic chemistry and analysis. Modules 1 to 4 also form the AS Level (H032).\n          <\/p>\n          <div class=\"ols-ocra-hero-actions\">\n            <a class=\"ols-ocra-btn\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/ocr-chemistry-gce\/\">View Courses<\/a>\n          <\/div>\n        <\/div>\n\n        <div class=\"ols-ocra-info-panel\" aria-label=\"OCR A Level Chemistry A overview\">\n          <div class=\"ols-ocra-info-item\">\n            <h2>A Linear Qualification<\/h2>\n            <p>\n              OCR A Level Chemistry A is assessed through three written papers taken at the end of the course. It is structured around specification code H432 and uses the A*-E A Level grading scale.\n            <\/p>\n          <\/div>\n          <div class=\"ols-ocra-info-item\">\n            <h2>Practical Endorsement<\/h2>\n            <p>\n              Students complete a minimum of 12 practical activity groups (PAGs) and develop practical competencies throughout the course. Module 1 practical skills are assessed in the written papers, while the Practical Endorsement in Chemistry (H432\/04) is reported separately as a pass.\n            <\/p>\n          <\/div>\n          <div class=\"ols-ocra-info-item\">\n            <h2>AS Level Chemistry<\/h2>\n            <p>\n              OCR AS Level Chemistry A (H032) is a separate standalone qualification. The AS content is Modules 1 to 4 of the A Level and is assessed by two written papers.\n            <\/p>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- THREE PAPERS -->\n  <section class=\"ols-ocra-papers\">\n    <div class=\"ols-ocra-container\">\n      <div class=\"ols-ocra-papers-grid\">\n        <div class=\"ols-ocra-paper-panel\">\n          <div class=\"ols-ocra-paper-item\">\n            <h3>Paper 1 &#8211; Periodic Table, Elements, Physical and Inorganic Chemistry<\/h3>\n            <div class=\"ols-ocra-paper-meta\">\n              Paper code: H432\/01<br>\n              Written examination: 2 hours 15 minutes | 100 marks | 37% of total A Level\n            <\/div>\n            <p>\n              Assesses content from Modules 1, 2, 3 and 5. This includes atomic structure, amount of substance, acids, redox, bonding and structure, periodicity, Group 2, the halogens, enthalpy, rates, equilibrium, lattice enthalpy, entropy, electrode potentials and transition elements.\n            <\/p>\n          <\/div>\n          <div class=\"ols-ocra-paper-item\">\n            <h3>Paper 2 &#8211; Synthesis and Analytical Techniques<\/h3>\n            <div class=\"ols-ocra-paper-meta\">\n              Paper code: H432\/02<br>\n              Written examination: 2 hours 15 minutes | 100 marks | 37% of total A Level\n            <\/div>\n            <p>\n              Assesses content from Modules 1, 2, 4 and 6. This includes basic organic concepts, alkanes, alkenes, alcohols, haloalkanes, organic synthesis, analytical techniques, aromatic compounds, carbonyls, carboxylic acids, amines, amino acids, polymers, and NMR spectroscopy and chromatography.\n            <\/p>\n          <\/div>\n          <div class=\"ols-ocra-paper-item\">\n            <h3>Paper 3 &#8211; Unified Chemistry<\/h3>\n            <div class=\"ols-ocra-paper-meta\">\n              Paper code: H432\/03<br>\n              Written examination: 1 hour 30 minutes | 70 marks | 26% of total A Level\n            <\/div>\n            <p>\n              Assesses content from all six modules. This paper draws the course together with synoptic questions, extended response and practical-based questions across physical, inorganic and organic chemistry.\n            <\/p>\n          <\/div>\n        <\/div>\n\n        <div class=\"ols-ocra-papers-copy\">\n          <h2 class=\"ols-ocra-section-title\">The Three Papers &#8211; How The A Level Is Assessed<\/h2>\n          <p>\n            The OCR A Level is assessed through three externally examined papers. Papers 1 and 2 divide the content by module, while Paper 3 draws across all six modules and places a strong emphasis on synoptic reasoning and practical skills.\n          <\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- PATHWAY -->\n  <section class=\"ols-ocra-pathway\">\n    <div class=\"ols-ocra-container\">\n      <div class=\"ols-ocra-pathway-card\">\n        <h2>OCR Specification Pathway<\/h2>\n        <p>\n          OCR Chemistry A is organised into modules and numbered sections rather than Edexcel-style numbered topics. OLS course cards pool the relevant OCR sections together so that students can study coherent course units while still seeing the exact OCR learning outcomes covered.\n        <\/p>\n        <div class=\"ols-ocra-pathway-list\">\n          <div class=\"ols-ocra-pathway-pill\"><strong>Modules 2 and 3 &#8211; Foundations, Periodic Table and Energy<\/strong>Atomic structure, amount of substance, acids, redox, electron structure, bonding, periodicity, Group 2, the halogens, enthalpy changes, reaction rates and equilibrium.<\/div>\n          <div class=\"ols-ocra-pathway-pill\"><strong>Modules 4 and 6 &#8211; Organic Chemistry and Analysis<\/strong>Basic concepts, alkanes, alkenes, alcohols, haloalkanes, synthesis, analytical techniques, aromatic compounds, carbonyls, acids, amines, polymers, chromatography and spectroscopy.<\/div>\n          <div class=\"ols-ocra-pathway-pill\"><strong>Module 5 &#8211; Physical Chemistry and Transition Elements<\/strong>Rates, equilibrium, acids, bases and buffers, lattice enthalpy, entropy, redox and electrode potentials, transition elements and qualitative analysis.<\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- STUDY WITH OLS -->\n  <section class=\"ols-ocra-study\">\n    <div class=\"ols-ocra-container\">\n      <h2>Study OCR Chemistry with OLS<\/h2>\n      <p>\n        OLS OCR courses are built around specification sections, with structured revision notes, worked examples, exam-style practice and clear links between practical skills and written exam questions.\n      <\/p>\n      <a class=\"ols-ocra-btn\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/ocr-chemistry-gce\/\">View Courses<\/a>\n      <div class=\"ols-ocra-study-image\">\n        <img decoding=\"async\" src=\"https:\/\/www.onlinelearningsystem.net\/xyz\/wp-content\/uploads\/2025\/07\/a-level-chemistry-virtual-lesson-tutor.webp\" alt=\"OCR A Level Chemistry online virtual lesson with tutor\" title=\"Study OCR Chemistry with OLS\">\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- CHOICE CARDS -->\n  <section class=\"ols-ocra-choice\">\n    <div class=\"ols-ocra-container\">\n      <div class=\"ols-ocra-choice-grid\">\n        <article class=\"ols-ocra-choice-card\">\n          <span class=\"ols-ocra-badge\">Full Qualification<\/span>\n          <h2>Take the A Level if&#8230;<\/h2>\n          <div class=\"ols-ocra-choice-line\"><\/div>\n          <span class=\"ols-ocra-chip\">OCR A Level Chemistry A &#8211; H432<\/span>\n          <p>\n            You need chemistry for university entry, particularly for medicine, dentistry, pharmacy, biochemistry, chemical engineering or related science degrees. The full A Level is the standard two-year qualification used for UK university admissions.\n          <\/p>\n        <\/article>\n        <article class=\"ols-ocra-choice-card\">\n          <span class=\"ols-ocra-badge\">Standalone Award<\/span>\n          <h2>Take the AS Level if&#8230;<\/h2>\n          <div class=\"ols-ocra-choice-line\"><\/div>\n          <span class=\"ols-ocra-chip\">OCR AS Level Chemistry A &#8211; H032<\/span>\n          <p>\n            You want a recognised one-year chemistry qualification without committing to the full A Level. The AS is a standalone qualification and does not contribute to the final A Level grade.\n          <\/p>\n        <\/article>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- VIDEO -->\n  <section class=\"ols-ocra-video-section\">\n    <div class=\"ols-ocra-container\">\n      <h2>Watch a Chemistry Lesson Preview<\/h2>\n      <p>\n        See how OLS uses visual explanation, molecular models and specialist teacher commentary to support difficult A Level Chemistry topics.\n      <\/p>\n      <div class=\"ols-ocra-video-wrap\">\n        <div class=\"ols-ocra-video-frame\">\n          <iframe src=\"https:\/\/www.youtube.com\/embed\/M0iLMXF5o6o?start=1\" title=\"A Level Chemistry online lesson preview\" loading=\"lazy\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen=\"\"><\/iframe>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- RESOURCES -->\n  <section class=\"ols-ocra-resources\">\n    <div class=\"ols-ocra-container\">\n      <div class=\"ols-ocra-resource-stack\">\n        <article class=\"ols-ocra-resource-card\">\n          <h3>Official Specification<\/h3>\n          <p>\n            The official OCR A Level Chemistry A specification covering the six modules, assessment structure, mathematical requirements and the practical endorsement.\n          <\/p>\n          <a class=\"ols-ocra-resource-link\" href=\"INSERT_LINK_HERE\">OCR Chemistry A Specification \u2192<\/a>\n        <\/article>\n        <article class=\"ols-ocra-resource-card\">\n          <h3>Past Papers &amp; Mark Schemes<\/h3>\n          <p>\n            The official OCR past papers area, including exam papers, mark schemes and examiner reports for OCR A Level Chemistry A.\n          <\/p>\n          <a class=\"ols-ocra-resource-link\" href=\"INSERT_LINK_HERE\">OCR Past Papers \u2192<\/a>\n        <\/article>\n        <article class=\"ols-ocra-resource-card\">\n          <h3>Chemistry Reference Library<\/h3>\n          <p>\n            LibreTexts Chemistry is a free, open-access chemistry library covering a wide range of topics at A Level and beyond, useful for deeper reading and alternative explanations of difficult concepts.\n          <\/p>\n          <a class=\"ols-ocra-resource-link\" href=\"INSERT_LINK_HERE\">LibreTexts Chemistry \u2192<\/a>\n        <\/article>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- FAQ -->\n  <section class=\"ols-ocra-faq\">\n    <div class=\"ols-ocra-container\">\n      <h2>FAQ<\/h2>\n      <div class=\"ols-ocra-faq-grid\">\n        <div class=\"ols-ocra-faq-item\">\n          <button class=\"ols-ocra-faq-question\" type=\"button\"><span class=\"ols-ocra-faq-title\">How is OCR A Level Chemistry A organised?<\/span><span class=\"ols-ocra-faq-icon\">+<\/span><\/button>\n          <div class=\"ols-ocra-faq-answer\"><div class=\"ols-ocra-faq-answer-inner\">The specification is organised into six modules, each divided into numbered sections such as 2.1.3 Amount of substance or 4.1.3 Alkenes, with lettered learning outcomes inside each section. OLS uses these OCR section references directly so students can revise by exact learning outcome.<\/div><\/div>\n        <\/div>\n        <div class=\"ols-ocra-faq-item\">\n          <button class=\"ols-ocra-faq-question\" type=\"button\"><span class=\"ols-ocra-faq-title\">How many exams are there for OCR A Level Chemistry A?<\/span><span class=\"ols-ocra-faq-icon\">+<\/span><\/button>\n          <div class=\"ols-ocra-faq-answer\"><div class=\"ols-ocra-faq-answer-inner\">There are three written papers: Paper 1, Paper 2 and Paper 3. Papers 1 and 2 are each worth 37% of the A Level, while Paper 3 is worth 26%.<\/div><\/div>\n        <\/div>\n        <div class=\"ols-ocra-faq-item\">\n          <button class=\"ols-ocra-faq-question\" type=\"button\"><span class=\"ols-ocra-faq-title\">Does OCR use Edexcel-style topic numbers?<\/span><span class=\"ols-ocra-faq-icon\">+<\/span><\/button>\n          <div class=\"ols-ocra-faq-answer\"><div class=\"ols-ocra-faq-answer-inner\">No. OCR uses module and section references such as 2.1.1 Atomic structure and isotopes, 3.2.1 Enthalpy changes and 4.1.3 Alkenes, with learning outcomes labelled (a), (b), (c) and so on. OLS course cards may pool several OCR sections into a single course unit where that produces a clearer learning sequence.<\/div><\/div>\n        <\/div>\n        <div class=\"ols-ocra-faq-item\">\n          <button class=\"ols-ocra-faq-question\" type=\"button\"><span class=\"ols-ocra-faq-title\">Are practical skills assessed in the written papers?<\/span><span class=\"ols-ocra-faq-icon\">+<\/span><\/button>\n          <div class=\"ols-ocra-faq-answer\"><div class=\"ols-ocra-faq-answer-inner\">Yes. Module 1 practical skills are assessed across all three written papers. Students also complete practical activity groups (PAGs) during the course for the separately reported Practical Endorsement.<\/div><\/div>\n        <\/div>\n        <div class=\"ols-ocra-faq-item\">\n          <button class=\"ols-ocra-faq-question\" type=\"button\"><span class=\"ols-ocra-faq-title\">Is the AS Level part of the A Level grade?<\/span><span class=\"ols-ocra-faq-icon\">+<\/span><\/button>\n          <div class=\"ols-ocra-faq-answer\"><div class=\"ols-ocra-faq-answer-inner\">No. OCR AS Level Chemistry A (H032) is a standalone qualification. It covers Modules 1 to 4 but does not contribute to the final A Level grade.<\/div><\/div>\n        <\/div>\n        <div class=\"ols-ocra-faq-item\">\n          <button class=\"ols-ocra-faq-question\" type=\"button\"><span class=\"ols-ocra-faq-title\">How much mathematics is involved?<\/span><span class=\"ols-ocra-faq-icon\">+<\/span><\/button>\n          <div class=\"ols-ocra-faq-answer\"><div class=\"ols-ocra-faq-answer-inner\">OCR Chemistry A includes substantial mathematical work: at least 20% of the marks assess mathematics at Level 2 or above, covering moles, concentrations, energetics, equilibria, rates, logarithms, graph work and practical-data analysis. Students should be confident rearranging equations and interpreting quantitative data.<\/div><\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <script>\n    (function () {\n      var BASE = \"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/ocr-a\/\";\n\n      var rows = [\n        {\n          id: \"module-2\", labelClass: \"ols-nav-physical\", chipClass: \"ols-chip-physical\",\n          label: \"Module 2\", qual: \"FOUNDATIONS\", desc: \"AS + A Level\",\n          topics: [\n            { num: \"2.1.1\", name: \"Atomic Structure and Isotopes\", paper: \"Paper 1\", locked: true },\n            { num: \"2.1.2\", name: \"Compounds, Formulae and Equations\", paper: \"Paper 1 &amp; 2\", locked: true },\n            { num: \"2.1.3\", name: \"Amount of Substance\", paper: \"Paper 1 &amp; 2\", locked: true },\n            { num: \"2.1.4\", name: \"Acids\", paper: \"Paper 1\", locked: true },\n            { num: \"2.1.5\", name: \"Redox\", paper: \"Paper 1\", locked: true },\n            { num: \"2.2.1\", name: \"Electron Structure\", paper: \"Paper 1\", locked: true },\n            { num: \"2.2.2\", name: \"Bonding and Structure\", paper: \"Paper 1 &amp; 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