Chemistry coursework investigating rates of reaction
I also have the particle theory to support my prediction and conclusion. My conclusion is valid because it includes evidence that my data is accurate and I have summed up my experiment in it.
Another possibility for the anomaly is that there was some other factor affecting the reaction rate. My conclusion is that the higher the concentration of Hydrochloric Acid the faster the reaction.
Investigating the rate of reaction between sodium thiosulphate and hydrochloric acid
Therefore:- Rate of reaction 1 concentration of acid time taken to react So As the magnesium is used up, the rate falls. I would also consider using a wider range of concentrations so I can do in-depth analysis and I can compare the two acids. This web page is meant to teach you how to tackle an coursework e. In your 'method' description use the correct units or descriptors. This shows that there is a difference in the data which proves accuracy. This would have made the experiment fairer providing more reliable and accurate results.
This means less collisions will occur and it would be a much slower reaction. The points in the top right are quite far down so this shows a negative correlation.
Rate of reaction concentration experiment
Even with a thermostated water bath normally only available to advanced level students , all the reactant solutions should be pre-warmed in the bath before mixing and start the timing and recoding of results. In our experiment the dependant variable was temperature, and if the concentration of one of the solutions had changed for some reason e. There will be more particles in a solution of hydrochloric acid with a higher concentration than in a lower concentration, in the same volume of liquid. This shows that the reaction is fastest at the start. The conical flask and all other equipment must be clean as any impurities may contaminate my experiment. Word process your work if you can and your results can be tabulated and processed into graphs using software packages like Excel Preliminary work usually involves doing a few trial runs of the experiment to see how it goes and making modifications if necessary. Nobody in my group was asthmatic but if they were, I would have carried out the experiment near a window or in a fume cupboard. Chemical reactions require a certain speed collision to react, and at this temperature very few of the particles collided, because of not moving around more due to lack of energy, because the heat was not very great.
Because we didn't, our results were not nearly as accurate as we would have liked. They prove the fact that temperature does affect the rate of reaction. If more experiments are conducted at another the time, the temperature must again be checked and recorded.
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