What increases the rate of reaction: higher or lower concentration?
Higher
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Why?
-There are more reactant particles in the same volume -There is a greater chance of the particles colliding -The rate of reaction increases
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What increases the rate of reaction: higher or lower pressure of reacting gasses?
Higher
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Why?
-There are more reactant particles in the same volume -There is a greater chance of the particles colliding -The rate of reaction increases
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What increases the rate of reaction: higher or lower temperature?
Higher
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Why?
-The reactant particles move more quickly -More particles have the activation energy or greater -The particles collide more often, and more of the collisions result in a reaction -The rate of reaction increases
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What increases the rate of reaction: higher or lower particle size?
Higher
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Why?
-Its surface area is increased -More particles are exposed to the other reactant -There is a greater chance of the particles colliding -The rate of reaction increases
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What happens to the catalyst during a chemical reaction?
It is unchanged and can be filtered
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What does a catalyst do?
It increases the rate of a reaction
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How?
It lowers the activation energy needed. More collisions result in a reaction, so the rate of reaction increases.
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Do all reaction require the same catalyst?
No, different reactions need different catalysts.
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Give an example of where a catalyst is used
Test with: Hydrogen peroxide and manganese dioxide
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What happens in this?
The catalyst (manganese dioxide) makes the hydrogen peroxide decompose into water and oxygen
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What can happen if a reaction occurs quickly?
It can boil
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Other cards in this set
Card 2
Front
Why?
Back
-There are more reactant particles in the same volume -There is a greater chance of the particles colliding -The rate of reaction increases
Card 3
Front
What increases the rate of reaction: higher or lower pressure of reacting gasses?
Back
Card 4
Front
Why?
Back
Card 5
Front
What increases the rate of reaction: higher or lower temperature?
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