The Effect of Temperature on the Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid

The Effect of Temperature on the Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid

I predict that as the temperature is increased the rate of reaction

will increase. This means that the graph drawn up in my analysis will

have positive link so it will look something like shown below, and

will probably be curved as the increase in rate of reaction will not

be exactly the same as the temperature is increased so the graph will

look something like this.

[IMAGE]

This can be justified by relating to the collision theory. When the

temperature is increased the particles will have more energy and thus

move faster. For that reason they will collide more often and with

more energy. Particles with more energy are more likely to overcome

the activation energy barrier to reaction and thus react successfully.

For a reaction to occur particles have to collide with each other.

Only a small percent result in a reaction. This is due to the energy

barrier to overcome. Only particles with enough energy to overcome the

barrier will react after colliding. The minimum energy that a particle

must have to overcome the barrier is called the activation energy. The

size of this activation energy is different for different reactions.

If the frequency of collisions is increased the rate of reaction will

increase. However the percent of successful collisions remains the

same. As this is an exothermic reaction heat will be given out so if

we are talking about bond braking or bond making, more bonds are being

broken than they are being made so heat will be given out and after

the reaction takes place the temperature should be more than before

the reaction took place.

The particles in a gas go through random collisions in which energy is

transferred between the colliding particles. As a result there will be

particles with differing energies. Therefore I predict that the graph

will be curved

Aim: -

My aim is to see the effects of a change in temperature on the rate of