In my experiment I applied H20 so that I could see the rate of reaction through a more dilute solution. Nevertheless I measured the time taken to the nearest second which builds precision in my experiment.
This would make my investigation more of a fair test because during my experiment I used a stronger concentration of the STS solution and so it would have been better if I used the stronger HCL solution.
My experiment was placed not in the way of people so that my experiment is not any risk to me or them. My data is very reliable and accurate as I have no outliers.
Also as the concentration of STS solution decreased, the time of reaction increased. The variable that I kept the same was the hydrochloric acid which remained at 30ml throughout the whole experiment. However in the 2 molar STS solution the rate of reaction was quick.
The method I used to carry out my experiment was very reliable. In order Chemistry coursework sodium thiosulphate conclusion provide additional evidence and extend my investigation to find out more and back up my conclusion I could perhaps repeat the experiment using specialist equipment.
If by chance I found an outlier I would not count it with the rest of my results and I would repeat that test again. It also has a line of best fit to show the consistency and accuracy of the results.
I will keep everything constant apart from the variable I am changing-temperature.
This problem would have been avoided if I used more accurate equipment. In addition to this, more particles have activation energy. I am very confident with the method I used whilst using simple equipment and obtaining fantastic results and my experiment was a success.
One of my problems I encountered during my experiment was the time taken to press the timer which in my opinion affected my results. Maybe using a better timer to record my results would have granted me more accurate results.
Which consisted of many types or variables such as: Below is a table to show the effect of changing different variables.
As well as in my preliminary test I also repeated the test three times so that I could see the results were accurate and precise. This altogether led to a decrease in the time taken for the reaction to happen. Taking temperature into consideration if I did not control this my results would be inaccurate.
Therefore allowing me to create an accurate test and allowing me to obtain precise results. Variables There are different variables which can be changed. Therefore this applies to the accuracy of the test. Furthermore I will be careful not to spill anything and will take extra care when doing the experiment.
Also I can see on my graph the scatter of results look very accurate and the natural trend of my results shows a negative correlation.
In addition I am also checking how different variables affect my experiment and also how I can make my test more precise, reliable and accurate. I could have also changed the concentration of the HCL solution. What my graph shows is that the percentage of sodium-thiosulphate increased then the time taken for the experiment decreased.
I can also improve my experiment by using a turbidity sensor which judges how cloudy things are.Jul 02, · This is an investigation about the decomposition of sodium thiosulphate. There are many factors (variables) which determine how fast or slow the reaction can take place (rate of reaction).
These are: Initial volume of sodium thiosulphate. The initial volume of hydrochloric acid. The initial volume of water. The temperature of the Reviews: Vitamin C Chemistry Coursework. Uploaded by SiwelEitak.
Related Interests. Chemical Reactions; Activation Energy; Redox; Iodine; producing iodine. The iodine that is produced is then titrated against sodium thiosulphate, to find how much iodine was produced by the reaction of the oxidising agent with potassium iodide.
In conclusion 5/5(5). In conclusion to this experiment, M of acid was the best to use as it had the best measurable reaction time. Equipment The equipment we will be using during this experiment is: GCSE Chemistry - Sodium Thiosulphate Coursework We must produce a piece of coursework investigating the rates of reaction.
Investigating how the concentration of sodium-thiosulphate (STS) and hydrochloric acid (HCL) affects the rate of reaction in the experiment.
Chemistry Gcse Coursework Rates of Reaction; Chemistry Gcse Coursework Rates of Reaction. In my preliminary test I checked my equipment and I came to a conclusion that my equipment was. Chemistry Rates of Reaction Coursework: Sodium Thiosulphate and Hydrochloric Acid An investigation to show how the rate of reaction between hydrochloric acid and sodium thiosulphate is affected by the concentration of the acid Simple Procedure Place a conical flask on a piece of paper with a cross on it.
Chemistry Coursework * Measuring cylinder - to measure the volume of hydrochloric acid. The chemicals needed for this experiment are: * Hydrochloric acid - this is the solution that the magnesium will react with, I will be using 10cm .Download