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 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: An input of heat energy is required to start some reactions. These two acids react well with the right materials. I could have use a colorimeter to identify colour changes in the products. I also made sure that any clothing or long jewellery was clear and out of our way as clothing can also get caught. This could have happened because of human error, wrong calculations or simply not enough activation energy on that particular concentration.
This increases the likelihood of reactants colliding properly and so increases the rate of the chemical reaction. This shows that there is no real difference between the results. I also made sure that the measuring cylinder was on a level surface so that I could clearly see how much liquid I was putting in to it. I could have use a colorimeter to identify colour changes in the products. Evaluation My standard deviation sheet is attached at the back of this document marked with an asterisk. The results for 1, 2 and 4M keep showing outliers.
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 chemiistry sodium thiosulphate stayed the same, the concentration of sodium thiosulphate stayed the same. There are a osdium mild outliers.
The room temperature could have affected my reaction and this could be the reason that I have some outliers. Reactions that happen quickly have a high rate of reaction.
Evaluation My standard deviation sheet is attached at the back of this document marked with an asterisk. Sodium thiosulphate is a colourless, crystal like compound and is used for dyes and is also a salt.
Rates of reaction vary depending on which chemicals are being used and the activation energy required. I think this because there is outliers in the 2M set of data and the error bars overlap between 1M and 2M on my error bar graph.
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: Rate of Reaction and Specific Rate Constant. I would also hycrochloric using a wider range of concentrations so I can do in-depth analysis and I can compare the two acids.
Rates of reaction of Sodium Thiosulphate with Hydrochloric Acid
I could have use a colorimeter to identify colour changes in the products. The points in the top right are quite far down so this shows a negative correlation. For example, rusting is a slow reaction; it has a low rate of reaction. These are circled on my graphs.
The bars for 3M, 4m and 5M do not overlap. This can be done by: My conclusion is valid because it includes evidence that my data is accurate and I have summed up my experiment in it. dodium
The reaction between Sodium Thiosulphate and Hydrochloric Acid.
I have highlighted the 2M results on my tables because it seems as though there is a problem with that set. This causes a quicker reaction. My data was quite accurate because all of my data follows a particular pattern and the tyiosulphate are all close together. Graphs All of the graphs that I drew for this investigation show a negative correlation. These chemicals are perfect for my investigation because they are both clear and colourless. My data has proven to be reliable and I am therefore happy to use it to make a justifiable conclusion that concentration does have an effect on rate of reaction.
Keep the size of my measuring flask is the same size; this should hopefully make my experiment much fairer and accurate. These reactions only happen if the reacting molecules collide properly.
(DOC) GCSE CHEMISTRY RATES OF REACTION COURSEWORK | Anjelina Qureshi –
Log In Sign Up. 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 good because it shows that for every increase coirsework concentration is a decrease in rate of reaction. When the solution is made more concentrated, there are a greater number of molecules in the same space.
Aim My aim is to investigate how changing the concentration of reactants can change the rate of reaction between hydrochloric acid and sodium thiosulphate. For every one M increase, the rate for reaction increases by 2.
This shows that there is no real difference between the results. In my investigation, there was the limitation of room temperature. I would do different trials on sulphuric acid and nitric acid. Help Center Find new hydrochlorric papers in: This is because there will be more acid molecules in the same amount of solution, therefore more effective collisions with the sodium thiosulphate, and the rate will be higher.