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18 Cards in this Set
- Front
- Back
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How can you find the rate of a chemical reaction? |
- By monitoring the amount of reactants used up over time. - Measuring the amount of products made over time. |
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What can the gradient of the line on a time graph can show you the rate of reaction at a specific time. The steeper the gradient the _______ |
faster the rate of reaction. |
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What can we do to calculate the rate of reaction at a specific time on a graph? |
Draw a tangent to the curve then calculate the gradient. |
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Before particles can react what must they do? |
Collide with a certain minimum amount of energy. |
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What is the minimum amount of energy called before particles can react? |
Activation energy |
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Why does the RoR increase when we increase surface area? |
- More particles exposed - More frequent colisons |
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Why does the RoR increase when we increase temperature? |
- More energy - More faster - More frequent collisions - Harder collisions |
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Why does the RoR increase when we increase catalyst? |
- Alternative route with lower Ea - Not used up |
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Why does the RoR increase when we increase catalyst? |
- Alternative route with lower Ea - Not used up |
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Why does the RoR increase when we increase concentration? |
- More particles per volume - More frequent collisions. |
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How can we test if a gas is produced? |
- Loss in mass. - Gas syringe / measuring cylinder |
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How can we test if a solid is produced? |
- Disappearing cross experiment |
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When there is Equilibria, this means that the forward and reverse rate is ____. |
Equal |
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True of False? Exothermic is positive? |
False |
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True of False? Endothermic is positive? |
True |
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What type of reaction is it if in one direction it's exothermic and the other is endothermic? |
Reversible reaction |
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Which direction will Equilibria shift to when you increase the temperature. |
In the endothermic direction. |
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When the pressure increases, what happens? |
Equilibria will shift to the side with fewer molecules. |
