I have chosen to investigate the concentration of hydrochloric acid and how it affects the rate of reaction of Sodium Thiosulphate.

To make my experiment a fair test I am going to use the same solutions. I will repeat the experiment again so that I will have two pairs of results and then get an average set of results. This will allow me to have a set of accurate results.

As I mentioned before, the rates of reaction depends on four things. All four methods of increasing the rate of reaction can be explained in terms of increasing the number of collisions.

Temperature increases the number of collisions. When the temperature is increased, the particles all move quicker. If they're moving quicker, they're going to have more collisions.

Reactions only happen if the particles collide with enough energy. At a higher temperature there will be more particles colliding with enough energy to make the reaction happen. This initial energy is known as the

A catalytic action is a chemical reaction between the catalyst and a reactant, forming chemical intermediates that are able to react more freely with each other or with another reactant. Thiosulphate.

I have predicted this due to the knowledge I have gained through my research. I found out that if I want to predict he rates of reaction, the collision theory would be useful to know about. This is because the collision theory is used to predict the rates of chemical reactions. The collision theory is based on the assumption that for a reaction to occur, it is necessary for the reacting species to come together or collide with one and other. Not all collisions however bring out chemical change. A collision will be effective in producing chemical change only if the species brought together own a minimum value of internal energy, equal to the activation energy of the reaction.

To do my experiment I need the following equipment:

3. The transfer of kinetic theory between molecules is heat. These simplifying assumptions bring the characteristics of gases within the range of mathematical treatment.

By looking at my graph I can see that when the concentration of the Hydrochloric acid is increased, the time taken for the cross to disappear decreases. This means that the concentration is inversely proportional to the time taken for the cross to disappear.

Some common words found in the essay are:
Sodium Thiosulphate, Concentration HCl, HCL Reaction, Flask Measuring, Pressure Pressure, Thiosulphate Prediction, , Catalyst Size, rate reaction, hydrochloric acid, cross disappear, collision theory, concentration hydrochloric acid, concentration hydrochloric, sodium thiosulphate, hcl acid, increases collisions, kinetic theory, activation energy, flask sodium thiosulphate, acid flask sodium, faster added 05m, knocking water molecules,
Approximate Word count = 1587
Approximate Pages = 6 (250 words per page double spaced)