What affects the rate of a chemical reaction?
Temperature
When the temperature goes up, the particles in liquids and gases move faster. They move faster because they have more energy, so they can bump into each other more often.
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When particles bump into each other more often and with more energy, there will be faster chemical reactions.
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Cold Hot
Concentration
Concentration is how much of a substance is mixed with another substance (to dilute). When there is more of a substance reacting with an object, the chemical reaction will be faster. This is because the will be more particles of the needed substance.
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When particles collide with each other more often, it will increase the rate of reaction.
Low Concentration High Concentration
Catalysts
Catalysts are chemicals that help to speed up the chemical reactions. They are also called ‘chemical helpers’.
Catalysts help to make it easier for particles to bump into each other.
Surface Areas
When there is more area of an object that can react to liquids, the reaction will become quicker. This is because the liquid can react with more of the object's particles at once.
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