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Rates of Reactions
The rate of reaction is the speed at which a chemical reaction takes place ­ this is measured by the
rate at which either: products are formed or reactants are used up.

Collision Theory
For a reaction to take place, the reactants have to collide with sufficient…

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Temperature °C measures heat, which is a form of energy. So when heated at high temperatures,
particles have more energy, and therefore more collisions have the necessary activation energy or
more to break bonds. Energy also makes them move faster which leads to more collisions. A 10°C
increase approximately…

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Different reactions require different catalysts.

Measuring Rates of Reactions
There are 3 ways to measure the speed of reaction:

1) Precipitation
It is the formation of a solid in a solution or inside another solid during
a chemical reaction. It can be used to measure the rate of reaction by…


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