Amount of Substance (AQA)

11 structured lessons plus a FREE required practical lesson included covering the AS Chemistry Topic Amount of Substance from the AQA Specification

Lesson 1: The Mole and Avogrado’s Constant

1. To know that the Avogadro constant is the number of particles in a mole
2. To calculate the number of moles present in a given mass of an element or compound using the mole equation
3. To rearrange the mole equation to calculate either the number of moles, Mr or mass of an element or compound

Lesson 2: Moles and 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 3: Moles in Solutions

1. To understand the terms dilute, concentrated and molar concentration
2. To calculate the amount of substance in mol, involving volume and molar concentration (moldm-3)
3. To calculate the mass concentration (gdm-3) of a solution

Lesson 4: The Ideal Gas Equation

1. To recall the ideal gas equation
2. To understand the properties of an ideal gas
3. To rearrange the ideal gas equation to determine either pressure, temperature, moles or volume

Lesson 5: Ions and 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 6: Ionic Equations

1. To write full balanced symbol equations for familiar and unfamiliar chemical reactions
2. To identify spectator ions in full balanced symbol equations
3. To convert full balanced equations into simplified ionic equations

Lesson 7: Acids, Bases and 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 8: Acids-Base Titration Procedures

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

Lesson 9: Acids-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

BONUS LESSON: Required Practical 1: Making a Volumetric Solution & An Acid-Base Titration

1. To be able make up a standard (volumetric) solution of an acid
2. To carry out a simple acid-base titration
3. To determine the unknown concentration of a base

Lesson 10: Empirical and Molecular Formula

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 11: 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