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Effect of concentration on reaction rate

K005/1181

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Credit

RHYS LEWIS, AHS, DECD, UNISA / JON BAUGH / SCIENCE PHOTO LIBRARY RHYS LEWIS, AHS, DECD, UNISA / JON BAUGH / SCIENCE PHOTO LIBRARY

Caption

Effect of concentration on reaction rate. Animation of the plotting of a graph for an experiment performed to study the effect of the concentration of the reactants on the rate of a reaction. The experiment placed magnesium ribbon in dilute (one molar) and concentrated (four molar) hydrochloric acid. The volume of hydrogen gas produced by each reaction was measured over ten minutes. In dilute acid (blue line) hydrogen is produced gradually, but it is clearly seen that the gas is produced much more quickly in concentrated acid (red line). This is because concentrated acid has more hydrogen ions in a given volume that reacts with the magnesium. The data is also shown in tabular form at the end of the animation.

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  • Duration: 00:00:38.01
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  • Format: Photo JPEG 100% QuickTime movie

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  • Capture Format: QuickTime Animation

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