Preparing your Lab
AllScienceTools
AllScienceTools
Reference guide for assigning oxidation numbers and understanding Redox reactions.
Search for an element symbol (e.g. Fe, O, Cl)
Chemistry has many exceptions. Use these rules as a hierarchy. If two rules conflict, the higher priority rule wins. (e.g., in OF₂, Fluorine (#5) is -1, so Oxygen must be +2, overriding rule #7).
Reference Module v1.0
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Step-by-step logical verification
Understanding Oxidation States & Redox Rules is fundamental. Our calculator uses standard algorithms aligned with academic curriculums to ensure the results match what you need for your classes.