Relative formula mass and the mole1 h 45 min of study
Balancing equations and stoichiometryReading · 0%
Empirical formulae, molecular formulae and percentage composition1 h 30 min of study
Reacting masses, limiting reactants, yield and atom economy2 h of study
Concentration, titration and solution calculations2 h of study
Gas volumes and gas stoichiometry1 h 15 min of study

This unit is ≈17% of the GCSE Chemistry, across 6 lessons. Full syllabus

Lesson 2 of 6 · Quantitative chemistry

Balancing equations and stoichiometry

3 quick checks≈3% of the testCore: Core: tested on most papers

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By the end you’ll be able to

write and balance symbol equations so that they conserve atoms and overall mass
explain that the coefficients in a balanced equation give the stoichiometric ratios of moles of reactants and products
use balanced equations to determine mole ratios between substances in a reaction
calculate the amount of one substance from the amount of another substance using stoichiometric relationships

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Adaptive questions on balancing equations and stoichiometry.

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interpret word equations, symbol equations and ionic equations quantitatively where these are within specification scope

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