Only particles on the surface of the solid will be able to undergo collisions with the particles in a solution or gas. There are no anomalous results which shows that the experiment was very accurate. In my scatter graph with line of best fit, most of the points are close to the line.
However I have chosen to vary the sodium theosophical as It Is available in larger amounts, and various concentrations are prepared. The points in the top right are quite far down so this shows a negative correlation.
A beaker is half filled with hot water from a tap. This energy gives the reactant particles enough energy to collide with enough force to break apart the bonds so that new products can be made from atoms.
This is because they are the most practical to investigate — it would take longer to prepare a solid in powdered and unprepared form, and it is difficult to get accurate readings due to the inevitabilities of human errors, and as gas is mostly colorless it is difficult to gauge a reaction changing the pressure, and If a substance Is added to give the gas color, It may Influence the outcome of the experiment.
From this evidence I believe my results were very reliable. The time graph for the temperature experiment has a much steeper curve than the one for the concentration experiment, meaning that the decrease in time taken for the reaction was far more rapid.
Below are diagrams to illustrate and explain my method Fair Test To ensure that this experiment is fair I will control the variables, i. In my experiment I applied H20 so that I could see the rate of reaction through a more dilute solution.
What I predicted in my preliminary test was, as the sodium-thiosulphate concentration increased, the time taken for the solution to turn cloudy took longer. I could have use a colorimeter to identify colour changes in the products. This ensures that the solution is completely opaque when I stop the timer.
Taking temperature into consideration if I did not control this my results would be inaccurate. My results were outstanding seen as though I had no outliers or the error bars on my graph are very small.
I will then put 40cm3 of sodium thiosulphate into a conical flask and place it on a tripod and gauze. This increases the concentration and thus the rate of reaction.
My experiment was carried out very safely. Fair Test — In order for my findings to be valid the experiment must be a fair one. If solutions of reacting particles are made more concentrated there are more particles per unit volume.
This is because as the temperature increases, the reactant particles move more quickly. I could also change the initial volume of either the hydrochloric acid or sodium thiosulphate solution and see if I get a similar pattern of results.
Overall I am really confident in this investigation, however I can make improvements.
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 how the concentration of sodium-thiosulphate (STS) and hydrochloric acid (HCL) affects the rate of reaction in the experiment. Chemistry Gcse Coursework Rates of Reaction; Chemistry Gcse Coursework Rates of Reaction.
In my preliminary test I checked my equipment and I came to a conclusion that my equipment was. In conclusion to this experiment, M of acid was the best to use as it had the best measurable reaction time.
Equipment The equipment we will be using during this experiment is: GCSE Chemistry - Sodium Thiosulphate Coursework We must produce a piece of coursework investigating the rates of reaction.
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 elonghornsales.coms: Sodium thiosulphate is a colourless, crystal like compound and is used for dyes and is also a salt. Hydrochloric acid is colourless, poisonous and highly acidic. It is often used as a chemical intermediate and in petroleum production, food processing, pickling, and.
The effect of temperature on rates of reaction Aim: The aim of this experiment is to find out if the reaction rate of sodium thiosulphate solution and hydrochloric acid will be affected by a temperature change.Chemistry coursework sodium thiosulphate conclusion