Rates of Reaction GCSE Chemistry AQA (higher)

My fourth quiz - C2.4 in the AQA revision guide.

Questions on practically every sentence in this chapter.

This was a relatively short chapter so there are only 20 questions. 

?
What does the rate of a reaction measure?
the speed of a reaction
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How can the rate of reaction be found?
measuring how much of a reactant is up
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How else can the rate of reaction be found?
Measuring how much product is formed in a given time
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Rate =
amount of product used divided by time
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rate can also =
amount of product formed, divided by time
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The higher the rate, the...............time it takes for the reaction.
shorter
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What is the collision theory of reactions?
That particles have to collide for reactions to happen
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What is the activation energy?
The minimum energy that particles need to change into a new substance when they collide with other particles..
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What factors increase the rate of a reaction?
changes in temperature, surface area and pressure
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Why do powders react faster than solids?
because they have a bigger surface area
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How can we measure the rate of a reaction that gives off a gas?
By measuring to volume of gas at time intervals
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What temperature change doubles the rate of many reactions?
10C
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Why does increasing the concentration of a reaction increase the rate of reaction?
There are more particles in the same volume
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How does increasing the pressure of gas increase the rate of reaction?
There are more molecules in the same volume so they collide more frequently
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Why is it useful to measure concentrations in moles per cubic decimetre?
So we can measure out equal amounts of particles by measuring out the same concentration.
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What is the effect of a catalyst on the activation energy of a reaction?
The catalyst lowers the activation energy
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Why can expensive catalysts be economical?
Because they last a long time
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Why are many different catalysts needed?
Because there are many different types of reactions
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Do you consider this a good quiz?
YOU MAKE AWESOME QUIZZES.
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Other cards in this set

Card 2

Front

How can the rate of reaction be found?

Back

measuring how much of a reactant is up

Card 3

Front

How else can the rate of reaction be found?

Back

Preview of the front of card 3

Card 4

Front

Rate =

Back

Preview of the front of card 4

Card 5

Front

rate can also =

Back

Preview of the front of card 5
View more cards

Comments

Lamise Hassan

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This was great!! Two wrong though aha

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