Redox

Build the fundamental skill of assigning oxidation states. 

Before you can balance an equation or identify a process, you must be able to track electrons.
This tool provides targeted practice on a wide variety of molecules and complex ions.
You’ll learn to apply the rules for oxygen, hydrogen, and neutral molecules until you can determine the oxidation state of any central atom with speed and precision.

Master the link between Oxidation Numbers and Redox Reactions.

This tool guides you through the logic required to identify whether a species has been oxidized or reduced.
By calculating the oxidation number of a specific element in both the reactant and product, you'll learn to recognize the "increased" or "decreased" patterns that define redox processes.
Perfect for building the foundational reasoning needed for your written justifications.

Practice the "Step-by-Step" method for complex half-equations. 

Sharpen your stoichiometric skills with our interactive whiteboard simulator. Work through a pool of 20 essential redox couples—from simple metal ions to complex polyatomics like dichromate and thiosulfate.