Factors Affecting Rate Flashcards

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Name four factors that can change the rate of a chemical reaction.

Temperature, concentration, pressure of gases, surface area and catalysts.

The rate increases because the particles move faster and collide more often.

Higher concentration makes the reaction faster. There are more particles in each volume.

The rate increases. Gas particles are more crowded, so they collide more often.

Smaller pieces or powders react faster than large lumps. They have a larger surface area.

The powder reacts faster than the lump. It has a larger surface area for collisions.

A catalyst speeds up the reaction. It is not used up in the reaction.

You could cool the reaction down or use more dilute solutions. You could use larger solid pieces or lower the gas pressure.