Science Coursework-Rates Of Reactions
Science Coursework-Rates of Reactions
Introduction
Investigating how the concentration of sodium-thiosulphate (STS) and hydrochloric acid (HCL) affects the rate of reaction in the experiment. 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.
Strategy
According to my results, as the concentration of STS solution increased the rate of reaction of my experiment was increased. Also as the concentration of STS solution decreased, the time of reaction increased. In my preliminary test I checked my equipment and I came to a conclusion that my equipment was working well. The preliminary test checked if the experiment actually worked and the things …show more content…
The variable I changed was the volume of STS and the volume of water. The variable that I kept the same was the hydrochloric acid which remained at 30ml throughout the whole experiment. By doing so it made my experiment a fair test as I was controlling other variables such as HCL. I kept the other variables the same in order to allow my experiment to be a fair test. Taking temperature into consideration if I did not control this my results would be inaccurate. My experiment was carried out very safely. I made sure that I was wearing my safety goggles whilst I carried out my test. My experiment was placed not in the way of people so that my experiment is not any risk to me or them. In addition the safety rules made my experiment a fair test. Nevertheless regarding my data of results I had were very reliable and precise as I don’t have any outliers and my graph shows that the increase of STS is directly proportional to the time taken for the solution to become cloudy. To make sure that my test went accurately and precisely I made sure that my timing was accurately done not pressing the timer too early or late. This again shows that my test was a fair …show more content…
My data is very reliable and accurate as I have no outliers. I probably did not encounter any outliers because the precision and the accuracy I applied to my investigation during timing or measuring etc. this shows the reliability of my investigation. The results could have been improved by repeating the investigation more times so that I can further improve the reliability of my data. On the other hand I am very confident with my results. On my graph the results show very small error bars which suggests that my results again were very accurate. I was also confidant with the safety of this experiment which mostly when I was pouring out STS and HCL. Therefore this applies to the accuracy of the test. On my table of results I repeated my investigation 3 times to ensure the reliability of my data. Nevertheless I measured the time taken to the nearest second which builds precision in my experiment. I am very confident with the method I used whilst using simple equipment and obtaining fantastic results and my experiment was a
Introduction
Investigating how the concentration of sodium-thiosulphate (STS) and hydrochloric acid (HCL) affects the rate of reaction in the experiment. 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.
Strategy
According to my results, as the concentration of STS solution increased the rate of reaction of my experiment was increased. Also as the concentration of STS solution decreased, the time of reaction increased. In my preliminary test I checked my equipment and I came to a conclusion that my equipment was working well. The preliminary test checked if the experiment actually worked and the things …show more content…
The variable I changed was the volume of STS and the volume of water. The variable that I kept the same was the hydrochloric acid which remained at 30ml throughout the whole experiment. By doing so it made my experiment a fair test as I was controlling other variables such as HCL. I kept the other variables the same in order to allow my experiment to be a fair test. Taking temperature into consideration if I did not control this my results would be inaccurate. My experiment was carried out very safely. I made sure that I was wearing my safety goggles whilst I carried out my test. My experiment was placed not in the way of people so that my experiment is not any risk to me or them. In addition the safety rules made my experiment a fair test. Nevertheless regarding my data of results I had were very reliable and precise as I don’t have any outliers and my graph shows that the increase of STS is directly proportional to the time taken for the solution to become cloudy. To make sure that my test went accurately and precisely I made sure that my timing was accurately done not pressing the timer too early or late. This again shows that my test was a fair …show more content…
My data is very reliable and accurate as I have no outliers. I probably did not encounter any outliers because the precision and the accuracy I applied to my investigation during timing or measuring etc. this shows the reliability of my investigation. The results could have been improved by repeating the investigation more times so that I can further improve the reliability of my data. On the other hand I am very confident with my results. On my graph the results show very small error bars which suggests that my results again were very accurate. I was also confidant with the safety of this experiment which mostly when I was pouring out STS and HCL. Therefore this applies to the accuracy of the test. On my table of results I repeated my investigation 3 times to ensure the reliability of my data. Nevertheless I measured the time taken to the nearest second which builds precision in my experiment. I am very confident with the method I used whilst using simple equipment and obtaining fantastic results and my experiment was a