Then, they will all be at the same temperature, which should be recorded. Even with a thermostated water bath normally only available to advanced level studentsall the reactant solutions should be pre-warmed in the bath before mixing and start the timing and recoding of results. This problem would have been avoided if I used more accurate equipment.
After immersing the nails for a few hours, you can see rusts on the nails. As the range of volumes of STS I had consisted between 12ml to 40ml although if I applied higher concentrations the test would have been more reliable.
Chemistry coursework rate of reaction help - masscot. Overall I am really confident in this investigation, however I can make improvements.
I first picked the type of experiment I was going to do. If you are looking at changing the reaction temperature, its not easy to accurately vary and control the temperature of the reactants without a thermostated water bath to hold the reaction flask in.
This suggested that my experiment was carried out very accurately.
I will discuss these further in my evaluation. In the case of the sodium thiosulphate - acid reaction, you can leave the thermometer in the flask and take the temperature at the end, then use an average for the temperature of the reaction.
On the advanced gas calculations page, temperature sources of error and their correction are discussed in calculation example Q4b. On my graph the results show very small error bars which suggests that my results again were very accurate.
Then, they will all be at the same temperature, which should be recorded. All experiments should be repeated where time allows checking for accuracy and consistency; this may become more necessary after you have done a preliminary analysis The 'bung effect'!
This sets the scene. If you are confident and chosen the VARIABLE you want to investigate you should try to make a quantative prediction and maybe justify it with some theory if you can. Limitations My limitations could have been: If you are varying temperature, you need to heat up the reactant solutions separately and take their temperatures, mix, start stopwatch.
I am doing my coursework on rates of reaction. Aim My aim is to investigate how changing the concentration of reactants can change the rate of reaction between hydrochloric acid and sodium thiosulphate.
Some examples are listed below. Therefore the data I obtained looks very reliable. This is good because I will instantly be able to see any change in the solution. I decided that it would be best for me to use a bold marker pen to make the mark more visible under the conical flask.
The results could have been improved by repeating the investigation more times so that I can further improve the reliability of my data. What further experiments, using the same method or another method, could be done to support your prediction or conclusion?
Collecting Data In my experiment most of the variables I had were: If you have decided, for example, to investigate the effect of acid concentration on the speed of a reaction, then everything else should be kept constant for a fair test, and this should be obvious in your plan for the reasons discussed above!
I am very confident with the method I used whilst using simple equipment and obtaining fantastic results and my experiment was a success.
My experiment was carried out very safely. My data is very reliable and accurate as I have no outliers. GCSE physics coursework is designed for you to show that you are aware how The line of best fit shows a natural trend between the solution and the average time taken.
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.
These two acids react well with the right materials. After rates of reactions gcse coursework immersing rates of reactions gcse coursework the nails for a few hours, you can see rusts on the nails How to change essay for euthanasia introduction the rate of a reaction There are 4 methods by which you buy a business plan online can increase the rate of a reaction: In addition the safety rules made my experiment a fair test.
Sodium-thiosulphate — used as solution as part of my experiment Hydrochloric Acid — used as solution as part of my experiment Beaker — used for carrying the solution Measuring cylinder — used for measuring the volume of solution Timer — used to measure the time taken for the solution to get cloudy Calculator — used to calculate the average time Conical Flask — used to carry out the experiment Black-cross card- used to see weather or not the solution had turned fully cloudy.
The variable I changed was the volume of STS and the volume of water. Some catalysts work by providing a surface for the reacting particles to come together.
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.
If you are varying temperature, you need to heat up the reactant solutions separately and take their temperatures, mix, start stopwatch.[tags: GCSE Chemistry Coursework Investigation] Research Papers words ( pages) The Effect of Temperature of Hydrochloric Acid on the Rate of Reaction Between Hydrochloric Acid and Magnesium.
- The Rate of Reaction Introduction ===== The rate of reaction is how fast/the speed at which a chemical reaction takes place. The rate of reaction is found by measuring the amount of a reactant used up per unit of time or the amount of a product produced per unit of time.
In order to get maximum marks in this coursework it is vital that you discuss all factors which affect the rate of a reaction. These include: Temperature. GCSE Chemistry - Sodium Thiosulphate Coursework We must produce a piece of coursework investigating the rates of reaction, and the effect different changes have on them.
The rate of reaction is the rate of loss of a reactant or the rate of formation of a product during a chemical reaction. In this piece of science coursework I will be experimenting how the rate of reaction between Sodium thiosulphate and hydrochloric acid is affected by the concentration of Sodium thiosulphate.
Enthalpy 2|Page Anjelina Qureshi Mrs Gravell Rates of Reaction Coursework Chemistry Year 11 Enthalpy, in chemistry, is the heat content in a chemical reaction. The enthalpy change is the amount of heat absorbed or released when a chemical reaction occurs at a constant pressure.Download