# Rates of reaction experiment HCl and Sodium Thiosulphate

by hamzy_usmanhotmailcom (student)

Rate of reactions

The rate of reactions is how fast something changes from its reactants to its products. For a reactions to occur, the particles must strike with enough energy. At the start of the practical only some of the reactions will have enough energy to strike with each other and create energy for the reaction to happen.

We can increase the rate of reaction by changing specific conditions in order to increase the rate of collision what will happen is that one of the things what can change it is the temperature because it provides the reactant with more energy. So this means the particles will be moving around more and therefore they are more likely to collide with each other. Another one is the concentration because by increasing the concentration of a reactant we are increasing the number of particles in a certain volume. This means there is more likely to be more collisions because they is more particles with in a small space. Another one could be pressure because by increasing the pressure we are decreasing the space in what the practices can move about in. so this means the practices will be more likely to collide with each other because there is less space for them to move around. Another one could be a catalyst because this is a lower activation energy required by particles to start a reaction and provides another route for the reaction to occur, thus speeding up the reaction.

In the reaction what I will carry out the equation is:

Hydrochloric acid + sodium thiosulfate                sodium chloride + sulphur dioxide +

Sulphur + water

2HCl (aq)        +       Na2s2o3 (aq)                                2Nacl (aq) + SO2 (g) + S (s) + H2O (l)

On this experiment we will be changing the concentration of the hydrochloric acid. So if we change the concentration of the experiment we are increasing the number of practices inside the reactions.

Hypothesis

Based on the information’s what I put about the rate of reaction I think as the concentration increase the rate of reactions will increase as well because they will be more practical inside the experiment so they will be colliding with ...