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Potassium is a chemical element that ignites when it comes into contact with water. When potassium reacts with water, it produces potassium hydroxide and hydrogen gas. This reaction is highly exothermic, meaning it releases a significant amount of heat energy, leading to the ignition of the hydrogen gas. Potassium's reactivity with water is a well-known demonstration of alkali metals' properties in chemistry.

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7mo ago

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