GCSE Chemistry – Limiting Reactants & Balanced Equations (2026/27 exams)

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*** BALANCING EQUATIONS VIDEO ***

*** WHAT’S COVERED ***
1. The concept of limiting reactants.
* The definition of a limiting reactant and a reactant in excess.
* An explanation of how the limiting reactant determines the total amount of product that can be formed in a chemical reaction.
2. How to perform calculations involving limiting reactants.
* Identifying the limiting reactant in a given problem, whether explicitly stated or implied.
* A step-by-step method for calculating the mass of a product using the limiting reactant.
* Balancing the chemical equation.
* Calculating the number of moles.
* Using the molar ratio to determine the moles of the product.
* Calculating the final mass of the product.
3. A worked example calculation.
* Calculating the mass of sodium oxide produced from the combustion of a given mass of sodium in air.

*** EXAM BOARD SPECIFIC INFO ***
– Higher tier only
– All exam boards
– Triple and combined science

*** CHAPTERS ***
0:00 Introduction
0:18 What are Limiting Reactants?
1:15 What are Excess Reactants?
1:54 Calculations with Limiting Reactants

*** PLAYLISTS ***

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