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Chapter 4: Electrochemistry (Advanced)
— When electrons move, chemistry becomes electricity — and electricity becomes chemistry. —
Why this matters
(I once held up a battery and asked a class, "What is inside this?" They said, "Chemicals." Then I asked, "What are the chemicals doing?" Silence. Then I explained: inside every battery, a chemical reaction is pushing electrons from one place to another. That flow of electrons is electricity. And the reverse is also true — when you pass electric
