IGCSE Chemistry Redox Reaction Notes

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Syllabus Objectives

IGCSE Chemistry Revision Notes

Topic Chemical reactions

Sub Topic:6.4 Redox

Syllabus Objectives:

CORE:

Use a Roman numeral to indicate the oxidation number of an element in a compound
Define redox reactions as involving simultaneous oxidation and reduction
Define oxidation as gain of oxygen and reduction as loss of oxygen
Identify redox reactions as reactions involving gain and loss of oxygen
Identify oxidation and reduction in redox reactions

EXTENDED:

Define oxidation in terms of:
(a) loss of electrons
(b) an increase in oxidation number
Define reduction in terms of: (
a) gain of electrons
(b) a decrease in oxidation number
Identify redox reactions as reactions involving gain and loss of electrons
Identify redox reactions by changes in oxidation number using:
(a)the oxidation number of elements in their uncombined state is zero
(b) the oxidation number of a monatomic ion is the same as the charge on the ion
(c) the sum of the oxidation numbers in a compound is zero
(d) the sum of the oxidation numbers in an ion is equal to the charge on the ion
dentify redox reactions by the colour changes involved when using acidified aqueous potassium manganate(VII) or aqueous potassium iodide
Define an oxidising agent as a substance that oxidises another substance and is itself reduced
Define a reducing agent as a substance that reduces another substance and is itself oxidised
Identify oxidising agents and reducing agents in redox reactions

Revision Notes

IGCSE Chemistry Notes Redox Reaction

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