Investigating The Rate Of Reaction

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Investigating The Rate Of Reaction

Aim:

The aim will be to find out how the changing of concentration of a

solution will alter the rate of reaction.

Theory:

My own experiences of rate of reaction would probably be a rusting

iron ,a bomb going off, the firing of a bullet and charging the

battery of a mobile phone.

Chemical reactions occur when the molecules of 2 or more elements or

compounds, called the reactants, collide and recombine to form a new

compound, which is called the product. According to the collision

theory, these colliding molecules must first reach the reaction's

activation energy for the reaction to occur. Activation energy is the

level of energy required for the molecules to collide with enough

force to recombine and form a new product.

The rate of reaction describes how fast reactants form products in a

chemical reaction. Chemical reactions can be sped up or slowed down by

altering the surface area, concentration, and temperature of the

reactants.

Prediction:

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greater the concentration the more reactant particles there are in the

solution. There will be more collisions and so the reaction rate is

increased .For gases, increasing the pressure has the same effect as

increasing the concentration of dissolved particles.

Low pressure or concentration High pressure or concentration

(Dilute) (Concentrated)

The rate of reaction between two concentrated solutions will be faster

then between two dilute solutions.

The reason for this being is because a dilute solution only has a few

reactant particles in 1cm 3. So the particles canno't collide as

quickly as a concentrated colution, as you can see on the diagrams

above.

What reactions are suitable:

Magnesium + Sulphuric acid

Calcium carbonate + Hydrochloric acid

Sodium thiosulphate + Hydrochloric acid

Which one am I going to do:

Na2S2O3(aq)

+

2HCl(aq)

[IMAGE]

2NaCl(aq)

+

S(s)

+

SO2(g)

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