I would also consider using a wider range of concentrations so I can do in-depth analysis and I can compare the two acids. 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.
I am confident that these concentrations will give me sufficient results for my final graphs, so I feel there is no need for further preliminary testing. This fits in with my hypothesis and my data. Use of rate of reaction in industry The chemical industry makes medicine and many other substances such as; Limestone - this is used for building Sulphuric acid — used to make other substances Ammonia - used to make fertilisers.
Ensure that there are no naked flames. I then drew up graphs for my results Data Concentration Test Test 2 Chemistry coursework investigating rates of reaction 3 M 1 s s s 1 2 3 4 5 Table 1: Secondly I experimented with the mass of marble chips and amount of acid used in the experiments.
This shows that as you increase the independent variable the concentrationthe other variable the time taken for the experimentwent down. This ensures that the solution is completely opaque when I stop the timer.
This is supportive of my conclusion. This is because as the temperature increases, the reactant particles move more quickly. I drew 6 different graphs for this investigation. Aim My aim is to investigate how changing the concentration of reactants can change the rate of reaction between hydrochloric acid and sodium thiosulphate.
Therefore, I will make sure that I only change the temperature of the reaction mixture and keep the volume and concentration of the sodium thiosulphate, the volume and concentration of hydrochloric acid and the pressure of all the mixtures the same.
If you are confident and chosen the VARIABLE you want to investigate you should try to make a prediction and maybe justify it with some theory if you can. Reactions that occur slowly have a low rate of reaction. The range of my results were also suitable to make good observations and conclusions By comparing the repeated times on each of the experiments I can see that they were similar and each one was within two seconds of each repeat.
The points in the top right are quite far down so this shows a negative 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. This shows that there is a difference in the data which proves accuracy.
Below is a table to show the effect of changing different variables. The independent variables will be the initial volume and concentration of sodium thiosulphate, and the initial volume and concentration of hydrochloric acid.
Briefly explain how the method can be used to measure the speed - the results of the first few minutes is usually the most crucial - you can discuss briefly other methods, but perhaps better in evaluation as a means of further evidence. And supports my conclusion. Safety I will make sure I handle the sodium thiosulphate solution and hydrochloric acid with care.
The enthalpy change is the amount of heat absorbed or released when a chemical reaction occurs at a constant pressure.
In this reaction, the magnesium and acid are gradually used up. The volume of hydrogen gas produced is measured over a few minutes, and the results are used to plot a graph.
We Personal essay college topics usually express the reaction rate in terms of sanskrit essays in sanskrit language mahatma gandhi how fast a product is. Obtaining evidence - observations, measurements, in other words the results!
Decomposing hydrogen peroxide with a solid catalyst or soluble transition metal compound. I will discuss these further in my evaluation. I would expect the following graph to emerge from the results: This collection of over practical activities demonstrates a wide range of chemical concepts and processes.
Overall I think that my investigation was successful in obtaining reliable results. Refer to any previous laboratory experience with 'rate of reaction' experiments which may have helped you decide and design the experimental method.
I think this because concentration relates to the amount of molecules in the acid, and if there is a higher concentration of acid there is a larger amount of hydrogen chloride molecules in the acid and therefore they are more likely to collide and react with the calcium carbonate ions present in the marble chips.
I had to make sure that my classmates were safe as well as myself.Students follow the rate of reaction between magnesium and the acid, by measuring the amount of gas produced at 10 second intervals.
3 cm of magnesium ribbon typically has a mass of g and yields 40 cm 3 of hydrogen when reacted with excess acid. 50 cm 3 of 1M hydrochloric acid is a. This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation chemistry coursework investigating rates of reaction and the Royal Society dissertation topic generator of.
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. Jul 02, · A grade GCSE chemistry coursework, Rates of reaction, Decomposition of sodium thiosulphate, introduction, method, safety, results, discussion.
Sodium thiosulphate decomposition for GCSE, grade a slcbrand.coms: GCSE Chemistry Coursework: Investigating the rate of a reaction Your task is to plan, and carry out, an experiment to discover how to change the rate the reaction between sodium thiosulphate solution and dilute hydrochloric acid.
Investigating Rates of Chemical Reactions Essay - Investigating Rates of Chemical Reactions Planning. Introduction ===== I am going to investigate how increasing the concentration of a .Download