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

1331 Words3 Pages

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