Atoms & Reactions (OCR)

15 Full Lesson Bundle (included a free bonus lesson) covering the module 2.1 on Atoms & Reactions from the OCR A Level Chemistry A Specification. See below for the lesson objectives.

Lesson 1: Atomic Structure & Isotopes

1. To describe the atomic structure of an atom
2. To describe atomic structure in terms of protons, neutrons and electrons for atoms and ions, given the atomic number, mass number and any ionic charge
3. To define the term isotopes and to identify the atomic structure of isotopes in terms of protons, neutrons and electrons

Lesson 2: Relative Masses

1. To define the terms relative atomic mass, relative formula mass and relative molecular mass
2. To calculate the relative formula mass and relative molecular mass of compounds and molecules

Lesson 3: Mass Spectroscopy

1. To determine the relative atomic masses and relative abundances of the isotope using mass spectroscopy
2. To calculate the relative atomic mass of an element from the relative abundances of its isotope

Lesson 4: Ions & The Periodic Table

1. To predict the ionic charge of ions based on the position of the element in the periodic table
2. To recall the names of common atomic and molecular ions
3. To be able write the formula of ionic compounds

Lesson 5: Empirical and Molecular Formulae

1. To understand what is meant by ‘empirical formula’ and ‘molecular formula’
2. To calculate empirical formula from data giving composition by mass or percentage by mass
3. To calculate molecular formula from the empirical formula and relative molecular mass.

**Lesson 6: Water of Crystallisation **

1. To know the terms anhydrous, hydrated and water of crystallisation
2. To calculate the formula of a hydrated salt from given percentage composition or mass composition
3. To calculate the formula of a hydrated salt from experimental results

Lesson 7: Moles & Volumes (Solutions & Gas Volumes)

1. To calculate the amount of substance in mol, involving solution volume and concentration
2. To understand the terms dilute, concentrated and molar
3. To explain and use the term molar gas volume
4. To calculate the amount of substance in mol, involving gas volume

Lesson 8: Moles & Equations

1. To know how to balance symbol equations
2. To calculate the moles of reactants or products based on chemical equations and mole ratios
3. To calculate the masses of reactants used or products formed based on chemical equations and mole ratios

Lesson 9: Percentage Yield and Atom Economy

1. To know how to balance symbol equations
2. To calculate atom economy and percentage yield from balanced symbol equations
3. To calculate the masses and moles of products or reactants from balanced symbol equations

Lesson 10: Acids, Bases & Neutralisation

1. To know the formula of common acids and alkalis
2. To explain the action of an acid and alkali in aqueous solution and the action of a strong and weak acid in terms of relative dissociations
3. To describe neutralisation as a reaction of:
   (i) H+ and OH– to form H2O
   (ii) acids with bases, including carbonates, metal oxides and alkalis (water-soluble bases), to form salts, including full equations

Lesson 11: Acid-Base Titration Procedures

1. To outline the techniques and procedures used when preparing a standard solution of required concentration
2. To outline the techniques and procedures used when carrying out acid–base titrations
3. To determine the uncertainty of measurements made during a titration practical

Lesson 12: Acid-Base Titration Calculations

1. To apply mole calculations to complete structured titration calculations, based on experimental results of familiar acids and bases.
2. To apply mole calculations to complete non-structured titration calculations, based on experimental results of non-familiar acids and bases

Lesson 13: Oxidation States

1. To recall the rules for oxidation states of uncombined elements and elements in compounds
2. To determine the oxidation states of elements in a redox reaction
3. To identify what substance has been reduced or oxidised in a redox reaction

Lesson 14: Half Equations (Redox Reactions)

1. To understand what a half equation is
2. To explain what a redox equation is
3. To construct half equations from redox equations

Lesson 15: Redox Equations

1. To identify what substance has been reduced or oxidised in a redox reaction
2. To construct balanced half equations by adding H+ and H2O
3. To construct full ionic redox equations from half equations

**Note: Lesson 15 is a free bonus (stretch & challenge) lesson that focuses on redox in year 13 (module 5.2.3 (spec points a-c)) **

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