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Combined Science
OCR GCSE Combined Science A
Chemical Reactions
OCR GCSE Combined Science A · J250 · Topic C3
Chemical Reactions
Paper 3
· 34 notes
Understand that a chemical equation symbolically represents the overall changes occurring during a chemical reaction.
C3.1
Introduction to Chemical Reactions
C3.1a
Formulae of Elements and Compounds
C3.1b
Writing Chemical and Half Equations
C3.1c
Using the Periodic Table for Formulae
C3.1d
Deducing Compound Formulae from Ions
C3.1e
Balanced Ionic Equations
C3.1f
Using State Symbols
C3.1g
Gas Identification Tests
C3.1h
The Avogadro Constant and the Mole
C3.1i
Mass and Moles Relationship
C3.1j
Solution Concentration
C3.1k
Conservation of Mass
C3.1l
Mass Changes in Non-Enclosed Systems
C3.1m
Equation Stoichiometry and Limiting Reactants
C3.1n
Calculating Reactant and Product Masses
C3.2
Reaction Energetics
C3.2a
Exothermic and Endothermic Reactions
C3.2b
Reaction Profiles
C3.2c
Activation Energy
C3.2d
Calculating Energy Changes
C3.3
Types of Chemical Reactions
C3.3a
Oxidation and Reduction (Oxygen)
C3.3b
Oxidation and Reduction (Electrons)
C3.3c
Ions in Acids and Alkalis
C3.3d
Neutralisation Reactions
C3.3e
Generalising Aqueous Neutralisation
C3.3f
Reactions of Acids with Carbonates and Metals
C3.3g
Acid Concentration and Strength
C3.3h
The pH Scale
C3.3i
Hydrogen Ion Concentration and pH
C3.3j
Logarithmic Nature of pH
C3.3k
Measuring pH
C3.4
Electrolysis
C3.4a
Electrolysis Products at Electrodes
C3.4b
Electrolysis of Molten Compounds
C3.4c
Competing Reactions in Aqueous Electrolysis
C3.4d
Ions and Electrode Reactions
C3.4e
Electrolysis Techniques
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