If I was using solids, I could investigate surface area and for gases I could investigate pressure In concentration I looked at five different concentration of HCl The volume of HCl stayed the same; also the volume of sodium thiosulphate stayed the same, the concentration of sodium thiosulphate stayed the same. For example, rusting is a slow reaction; it has a low rate of reaction. Remember me on this computer. Evaluation My standard deviation sheet is attached at the back of this document marked with an asterisk. Also, it has a narrow top and so it is safer.
I could have use a colorimeter to identify colour changes in the products. This is very important because loose hair can not only get dipped into chemicals but can also obscure vision. Limitations My limitations could have been: In my investigation, there was the limitation of room temperature. 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.
This could have happened because of calculation errors, human errors, recording errors or a fault with the equipment that we used. I stood up to allow more space for others to walk by between the rooms.
If I was using solids, I could investigate surface area and for gases I could investigate thiosuphate In concentration I looked at five different concentration of HCl The volume of HCl stayed the same; also the volume of sodium thiosulphate stayed the same, the concentration of sodium thiosulphate stayed the same. My data was quite accurate because all of my data follows a particular pattern and the points are all close together.
(DOC) GCSE CHEMISTRY RATES OF REACTION COURSEWORK | Anjelina Qureshi –
I have used reliable resources to research this information and it all confirms my conclusion. The bars of 1M and 2M overlap and this shows that there is no real difference. There are a few outliers in my jydrochloric.
Rates of reaction vary depending on which chemicals are being used and the activation energy required.
Rates of reaction of Sodium Thiosulphate with Hydrochloric Acid
The points in the top right are quite far down so this shows a negative correlation. I did not swirl these together because I wanted to see the rate of reaction without any intervention.
For example, when my concentration was 1M the average reaction time was seconds, and then when the concentration was 5M the average reaction time was seconds. I will be timing and watching: 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.
Enter the email address you signed up with and we’ll email you a reset link. I decided that it would be best for me to use adid bold marker pen to make the mark more visible under the conical flask.
The reaction between Sodium Thiosulphate and Hydrochloric Acid.
This good because it shows that for every increase in concentration is a decrease in rate of reaction. Burning and explosions are very fast reactions: My data was precise because most of the points on my graphs are close to the line and are all close by each other.
To do this I would make sure that: And supports my conclusion. These chemicals are perfect for my investigation because they are both clear and colourless.
My Error bar graph shows a negative correlation. If I do a further investigation, I will try to minimise the number of mistakes that I make.
Aim My aim is to investigate how changing the concentration of reactants can change the rate of reaction between hydrochloric acid and sodium thiosulphate. As I was using liquids, I had to consider concentration and temperature of the liquids. On my ROR graph, there is a positive correlation. 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. Dependent variables are not controlled by the experimenter.
My conclusion is valid because it includes evidence that my data is accurate and I have summed up my experiment in it. This causes a quicker reaction. I did, however find some outliers in my results. This shows that my data is quite accurate. I then drew up graphs for my results Data Concentration Test Test 2 Test 3 M 1 s s s 1 2 3 4 5 Table 1: This could have happened because of human error, wrong calculations or simply not enough activation energy on that particular concentration.
I would do different trials on sulphuric acid and nitric acid. I could test this by asking one of my peers to follow the instructions and then asking for their feedback.