# Investigating Rates of Reactions

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Investigating Rates of Reactions

My aim is to investigate what factors affect the rate of reaction

between magnesium and hydrochloric acid. The factor that I will be

focusing on is the concentration of Hydrochloric acid.

[IMAGE]Reaction Equation: Mg (s) +2HCl (aq) = MgCl2 (aq) +H2 (g)

Magnesium + Hydrochloric Acid = Magnesium Chloride + Hydrogen

There are several different variables you can such as temperature,

concentration; surface area and whether or not to use a catalyst or

not these all affect the rate of reaction.

*The effect of temperature on the rate of reaction is that, if the

temperature is increased then the particles will move faster. This

energy, so more collisions will lead to a reaction.

*The effect of the surface area on the rate of reaction is, when one

of the reactants is a solid, the reaction must take place on the

surface of the solid. By breaking the solid into smaller pieces, the

surface area is increased, giving a greater area for collisions to

take place and so causing an increase in the rate of reaction.

*The effect of using a catalyst on the rate of reaction is that it

will speed up the rate of reaction. Using a catalyst lowers the

activation energy for the reaction. More collisions have sufficient

energy for reactions to take place. A catalyst that slows down a rate

of reaction is called an inhibitor.

*The effect of concentration on the rate of reaction is that, if the

concentration is increased, there are more particles within a given

volume, therefore more collisions occur and the reaction is faster.

The rate of reaction can also be defined, by using the collision

theory. A collision theory explains how chemical reactions take place

and why rates of reaction alter. For a reaction to occur the reactant,

particles must collide.

I am going to investigate how the concentration of hydrochloric acid

alters the rate of reaction. As I increase the amount of water, I