Follow the Electrons

You'll learnto track electrons between species and read oxidation numbers as oxidation and reduction.

Drop a strip of zinc into blue copper solution and the strip goes dark while the blue drains away, with nothing poured in and nothing bubbling off. What crossed was electrons, two of them from each zinc atom to each copper ion. Twelve short steps; press Next for each one.

12 STEPS · 6 QUICK CHECKS · ELECTRON TRANSFER · v3

two electrons, and where each of them lands

Before you start

What you're looking at

A zinc strip in blue copper(II) sulfate: the blue fading and a dark crust building, with nothing added.

The question

Zinc and copper swapped roles, so what crossed between them?

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