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Potassium reacting with water

Potassium reacting with water

A500/0313

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Credit

CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY

Caption

Potassium reacting with water. Water being dripped into a dish containing potassium metal. Potassium (chemical symbol K) is a silver-white, alkali metal. It reacts violently and exothermically (generating heat) with water (chemical symbol H2O), yielding potassium hydroxide (KOH) and hydrogen gas (H2). The reaction is explosive because the generated heat causes the hydrogen to ignite. The chemical equation for this reaction is: 2K + 2H2O ----> 2KOH + H2 Potassium metal is usually stored under kerosene because it oxidises when exposed to air.

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