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caption

Electrolysis of water using a Hoffman apparatus. Electrolysis uses an electrical current to decompose molecules of water. Reactions at the two electrodes are powered by the electric current from the battery. Oxygen and hydrogen gas bubbles are evolved at the anode and cathode respectively. Water molecules are composed of two hydrogen atoms and an atom of oxygen, leaving twice as much hydrogen as oxygen trapped in the test tubes. A burning splint ignites the hydrogen gas, while the oxygen relights a glowing splint.

headline Science Source General Science

created date 2010-02-13

credit EAST NEWS

source Science Source

byline Charles D. Winters

original transmission reference 3f3738

weight 1,33MB

size 22cm x 22cm by 300dpi

keywords - Show

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