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Sodium Reacts with Water

Sodium Reacts with Water

C039/1196

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Credit

TURTLE ROCK SCIENTIFIC / SCIENCE PHOTO LIBRARY TURTLE ROCK SCIENTIFIC / SCIENCE PHOTO LIBRARY

Caption

Sodium reacts with water. A small piece of sodium metal (Na) is dropped into a Petri dish with water (H2O). A drop of detergent was added to water to prevent the metal from sticking to the side of the dish. Sodium melts, moves around and fizzes vigorously, producing bubbles of hydrogen gas (H2) and sodium hydroxide (NaOH): Na + H2O -> NaOH + H2. The presence of the hydroxide is accentuated by the addition of few drops of phenolphthalein indicator, which turns the solution pink, indicating alkaline solution.

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