My results and evidence support my prediction very well.The independent variables in our experiment are the concentration of hydrochloric acid. I decided that it would be best for me to use a bold marker pen to make the mark more visible under the conical flask. They prove the fact that temperature does affect the rate of reaction. This is good because I will instantly be able to see any change in the solution. Another reason for the higher temperatures being very close together is that the water in the solutions was starting to boil, and therefore change state. I tucked in my tie and shirt, and took off my blazer. This means more of the particles collide and more of the collisions result in a reaction, so the rate of reaction increases. The more important factor is the kinetic energy of the particles and therefore the higher energy collisions when the temperature is raised. I have calculated the gradient of my line to support my hypothesis and found that: For every one M increase, the rate for reaction increases by 2. This means that the increased chance frequency of 'fruitful' higher energy collisions in a given time greatly increases the speed of the reaction, depending on the fraction of molecules with enough energy to react. Heat provides energy to the particles of reactants, and if there is not very much heat, the particles do not have very much energy.
Next I will place the conical flask on top of the cross, pour 5cm3 of hydrochloric into the hot sodium thiosulphate solution and time how long it takes for the cross to disappear. Factors affecting rate of reaction In the exam you will need to coursework the factors that affect the rate of reactions, and how to plot or interpret graphs from rate experiments.
The state symbol for sulphur dioxide is aq not g because it is dissolved in water as its original state would be too toxic and corrosive for me to use safely. The rate of reaction is the speed of a reaction.
My conclusion is valid because it includes evidence that my data is accurate and I have summed up my experiment in it. To improve the suitability of the procedure it would have to be done by the same person all the way through, using the same stopwatch.
Below is a table to show the effect of changing different variables.