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Edexcel IAL Chemistry 8.1 Oxidation numbers

Write the known values for H, O and any fixed-charge element, include each subscript, set their sum to the species charge and solve for the unknown value.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • Justify an oxidation number by summing element values to the compound's overall charge.
  • Calculate an element's oxidation-number change between the stated reactant and product.

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