From looking at the curve of best fit for the average results. The method of judging when the cross disappears will be changed, so the time taken to reaction can be recorded to a greater degree of accuracy. Therefore the time taken reduced by A clear pattern has emerged from the data and this pattern was repeatable.
For example, In the average result, when the volume of sodium thiosulphate is 10cm3, the time taken is sec. How closely does your prediction match up? E6a The graph is sufficient to support the conclusion.
It was predicted that an increase in concentration will lead to an increase in the rate of reaction. In order to provide additional evidence for my conclusion, I intend to embark on several things.
More essays like this: Although this will not greatly affect the overall result, it will no doubt only further ensure accuracy and therefore the significance of my findings.
Increase of concentrate in the same volume means that more particles are present and therefore, more frequent collisions are likely to occur. Use separate graph paper for this. This should involve a different method to obtain results E6b. The above two can only serve to increase the validity of my conclusions.
A prediction matches up very closely. The entire investigation was based on subjective opinion and for this reason the results were inevitably also subjective, for it was difficult to apply the same standard to judge when the cross disappeared.
Lastly, I intend to take the investigation one step further by not only identifying the effects of change in concentration on the rate of reaction but also to study the rate of reaction itself. How reliable are your results? First the amount quantity of data collected will be increased and this will be done in two ways: I consider the results to be reliable because they were recorded to the greatest degree of accuracy possible.
Furthermore a colorimeter will be used to judge when the reaction has been completed. Using the data from the table of average results: The solutions will then be judged according to the same standard.
Skill area E Describe any problems you had in carrying out your experiment E4b. The particles are closer together and have greater chance of colliding and therefore reacting. Moreover I will compare my results with those of my peers and also use results and findings of previous scientific research in this field of study to further verify my conclusions.
It is possible to conclude that the relationship between the concentration of Sodium Thiosulphate and rate of reaction is inversely proportional that as the concentration of Sodium Thiosulphate is increased, the time taken for the X to disappear significantly reduces. The activation energy barrier is more likely to be overcome when particle with greater energy react therefore collisions are more likely to occur.
Explain why you would make these changes E4b. This can be justified by relating to the Collision theory. Give a detailed outline of any further work that could provide additional evidence for your conclusion.
Although no obvious anomalies can be identified, the three tests, whilst behaving according to similar trends, vary in results and in reaction times. Explain your answer A8b. Do you have sufficient results to support your conclusion? However, when the volume of sodium thiosulphate is 70 cm3, the time taken is only This is due to the subjective nature of the experiment.Practical: reaction between dilute hydrochloric acid and sodium thiosulphate solution (disappearing GCSE Chemistry Coursework: Investigating the rate of a reaction Your task is to plan, and carry out, an experiment to discover how to change the rate the reaction between acid the same each time.
Analysis of results. Chemistry Coursework Planning Aim: To find the effect of concentration of thiosulphate on the rate of reaction between sodium thiosulphate and hydrochloric acid.
Rates of Reaction - Sodium Thiosulphate and Hydrochloric acid In this piece of coursework, I will study how concentration affects the rate of reaction. - Sodium Thiosulphate and Hydrochloric Acid Reaction Investigation Aim To see the effects of concentration on the rate of a reaction between sodium thiosulphate and hydrochloric acid.
Background information The collision theory briefly: For a reaction to occur particles have to. GCSE Chemistry - Sodium Thiosulphate coursework Preliminary Study I am going to investigate the rates of reaction, and the effect different changes and factors have on them.
The rate of reaction id the rate I lose a reactant or the rate of formation of a product during a chemical reaction. Reaction Between Sodium Thiosulphate And Hydrochloric Acid Biology Essay.
Print Reference In this experiment, we will be investigating the effect of temperature on the reaction between Sodium Thiosulphate and Hydrochloric Acid. The reaction between sodium thiosulphate and hydrochloric acid proceeds to the following chemical equation.Download