Credit: SCIENCE PHOTO LIBRARY MOTION

Caption: Reaction rate. Calcium carbonate being dropped into beakers of hydrochloric acid. At left the carbonate is powdered, at right it is a piece of marble. The powder reacts much more vigorously than the large single piece, seen by the rapid generation of carbon dioxide gas. The smaller the particle size, the larger the surface area per unit mass. This means more of the carbonate is in contact with the acid at any given time and thus the reaction rate is higher.

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Keywords: acidic, action, beaker, bubble, bubbles, bubbling, calcium carbonate, carbon dioxide, chemical, chemicals, chemistry, comparing, comparison, criteria, criterion, demonstration, dependence, difference, different, dynamics, effervescence, energetic, experiment, hydrochloric acid, inorganic, laboratory, marble, particle, powder, powdered, rate, reaction, rock, size, variable, vigorous, vigour

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Reaction rates due to particle size

K003/8962 Rights Managed

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Duration: 00:00:18

Frame size: 1920x1080

Frame rate: 25

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 599.6M

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Capture format: DSLR - AVCHD

Codec: H.264

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