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Chapter 9: Salts
— From the salt on your table to the salts in your cells — the chemistry of crystals. —
Why this matters
(I once asked a class, "What is the most common compound on Earth?" They guessed water. Then I asked, "What is the most common compound in your body that you never think about?" They guessed protein. The answer, in both cases, is a salt. Sodium chloride is the most common salt on Earth, and calcium phosphate is the mineral that makes your bones hard. Salts are not just t
