Chemical
Equations &
Reacting Masses
This AQA 3.1.2 section focuses on using balanced equations quantitatively. These pages cover writing chemical equations, ionic equations and using reacting masses with mole ratios from balanced equations.
Revision Notes
Work through each page in a structured AQA sequence.
Equations
Writing Chemical Equations
Writing balanced full chemical equations for reactions studied and unfamiliar reactions where reactants and products are specified.
Start revisingEquations
Ionic Equations
Writing ionic equations by removing spectator ions and representing the species that change during a reaction.
Start revisingMasses
Calculations Using Reacting Masses
Using balanced equations, amount of substance and molar ratios to calculate masses in chemical reactions.
Start revising3.1.2.5 Balanced Equations and Associated Calculations – AQA A Level Chemistry
The following AQA specification wording is covered across the Chemical Equations and Reacting Masses pages.
3.1.2.5 Balanced equations and associated calculations
Equations (full and ionic).
Percentage atom economy is: molecular mass of desired product / sum of molecular masses of all reactants x 100
Economic, ethical and environmental advantages for society and for industry of developing chemical processes with a high atom economy.
3.1.2.5 Balanced Equations and Associated Calculations – AQA A Level Chemistry
The following AQA specification wording is covered across the Chemical Equations and Reacting Masses pages.
3.1.2.5 Balanced equations and associated calculations
Equations (full and ionic).
Percentage atom economy is: molecular mass of desired product / sum of molecular masses of all reactants x 100
Economic, ethical and environmental advantages for society and for industry of developing chemical processes with a high atom economy.
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