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There are certain factors that affect the rate of reaction the four main factors are:

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Introduction

Rate of Reaction A rate of reaction is how slow or how fast a reaction takes place "the speed of the reaction" e.g. a slow reaction like rusting an explosion is a fast reaction. ...read more.

Middle

The increased speed results in a higher frequency of a collision between the reactant molecules and the rate increases. Heated molecules have a greater average kinetic energy, and so at higher temperatures, a greater proportion of them have the required activation energy to react Concentration: If the concentration of ...read more.

Conclusion

Gas/Gas or Liquid/Liquid then its is easy for the particles to mix with each other, giving them a greater opportunity to collide. If the reactant is a solid the reaction can only take place on the surface of the solid. Catalyst A catalyst is a substance that alters the rate of a chemical reaction without being used up or changed. ...read more.

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Here's what a star student thought of this essay

3 star(s)

Response to the question

Very brief and correct at the very basic level. Quite useful for revision just before the exam or to remember facts quickly. The author does not go further and deep into the effect that each factor plays in the rate ...

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Response to the question

Very brief and correct at the very basic level. Quite useful for revision just before the exam or to remember facts quickly. The author does not go further and deep into the effect that each factor plays in the rate of a chemical reaction. The essay provides nothing extra from information that can be obtained by all school books, maybe even less in some parts.

Level of analysis

The level of analysis is completely basic, yet useful for revision purposes. At the understanding level, this essay is quite weak as it does not provide any sort of evidence or reason for the effect played by each factor. There are many different ways to provide a greater surface area for a reaction to take place. e.g. grinding the solid reactants. Just a definition of a catalyst is not enough to explain its role in a reaction. A catalyst basically lowers the activation energy of a reaction by weakening the bonds of the reactants, therefore less energy is needed to break those bonds. This is called the activation complex so a greater portion of the reactants have enough activation complex.

Quality of writing

There are not many writing errors in the essay except a few mistyping. The technical language level is acceptable but not very strong. When explaining rate of reaction, the term "Successful collisions" must be used to imply that not all collisions result in a reaction taking place. In general the quality of writing is just fine.


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Reviewed by alireza.parpaei 26/06/2012

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