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Heating copper (II) carbonate

Heating copper (II) carbonate

C010/9636

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Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

Heating copper (II) carbonate. Copper (II) carbonate being heated in a test tube (right). This is a demonstration of thermal decomposition. The heat causes the copper (II) carbonate to break down into copper oxide (which is black) and carbon dioxide. The production of carbon dioxide is shown by bubbling the gas from the reaction through lime water (in tube at left). The lime water is saturated calcium hydroxide solution (Ca(OH)2) which reacts with carbon dioxide (CO2) to precipitate solid calcium carbonate (CaCO3). This turns the lime water cloudy from its initially clear state.

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