IGCSE Chemical Formulae Notes

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Syllabus Objectives

IGCSE Chemistry Chemical Formulae Notes

Topic:Stoichiometry

Sub Topic: 3-1-formulae

Syllabus Objectives:

CORE:

State the formulae of the elements and compounds named in the subject content
Define the molecular formula of a compound as the number and type of different atoms in one molecule
Deduce the formula of a simple compound from the relative numbers of atoms present in a model or a diagrammatic representation
Construct word equations and symbol equations to show how reactants form products, including state symbols

EXTENDED:

Define the empirical formula of a compound as the simplest whole number ratio of the different atoms or ions in a compound
Deduce the formula of an ionic compound from the relative numbers of the ions present in a model or a diagrammatic representation or from the charges on the ions
Construct symbol equations with state symbols, including ionic equations
Deduce the symbol equation with state symbols for a chemical reaction, given relevant information

Revision Notes

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