More marks are lost by not writing things down, than by not doing experiments! What my graph shows is that the percentage of sodium-thiosulphate increased then the time taken for the experiment decreased. The simplest solution here, is to make sure all the chemicals have been standing in the laboratory prior to the lesson.
Planning - the theory and your experiment design! 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.
A clearly labelled diagram of the method with a brief outline of how you intend to carry out the experiments - this cuts down on the writing and makes the scene clear!
I first picked the type of experiment I was going to do. My results were outstanding seen as though I had no outliers or the error bars on my graph are very small. Furthermore I will measure out the volumes of both the sodium thiosulphate and hydrochloric acid to the greatest degree of accuracy I can manage.
I also feel very confidant that my investigation went well. Complete a full risk assessment. To make sure that my test went accurately and precisely I made sure that my timing was accurately done not pressing the timer too early or late.
Also safety was equally important to the investigation. Primary The rate of reaction of magnesium with hydrochloric Physical change Mixing amp; dissolving Rates of chemical reactions Reaction kinetics Factors That Affect the Chemical Reaction Rate — ThoughtCo Several factors affect the rate at which chemical reactions proceed.
In addition the safety rules made my experiment a fair test. 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.
Some of the work done here in presenting the results, e. This altogether led to a decrease in the time taken for the reaction to happen. Furthermore, the graph is a perfect curve It is obvious that there is a general trend in the results. This is because as the temperature increases, the reactant particles move more quickly.
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. Where as when the STS was at 40ml the average time was 32 seconds which shows a very big relationship between the amount of STS and the time taken.
I predicted that I would find a wrong result whilst doing my experiment, however my prediction was wrong and the results were very accurate. These lessons are just a portion of our AP Chemistry course. Analysing and considering the evidence[ edit ] What do the results mean in terms of your prediction and theory!
Do your results seem consistent and accurate? 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. Your recorded results should indicate the accuracy of the measuring equipment e.
Similarly my real experiment was done very precisely such as calculating or measuring the results or measuring the amount of solution in each beaker etc.
We are basically talking about plotting the initial rate versus e. What graph could you then plot? It is often expressed in terms of either the concentration amount per unit volume of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.A grade GCSE chemistry coursework - Rates of reaction Decomposition of sodium thiosulphate by Luno 3 years ago A grade GCSE chemistry coursework, Rates of reaction, Decomposition of sodium thiosulphate, introduction, method.
Chemistry Plan I am going to produce a piece of coursework investigating the rate of reaction, selecting a variable to see how this affects the rate.
The rate of reaction is the rate of loss of a reactant or the rate of formation of a product. The rate is measured by dividing one by the time the reaction took to take place. sodium thiosulphate + hydrochloric acid sodium chloride + water + sulphur dioxide + sulphur The sulphur produced makes the reaction mixture go cloudy.
The faster the reaction, the faster the reaction mixture goes cloudy. You will investigate the effect of changing the concentration of sodium thiosulphate on the rate of reaction. Rates Of Reactions Chemistry Coursework – Splash › Forums › Rewrite Users › Rates Of Reactions Chemistry Coursework – This topic contains 0 replies, has 1 voice, and was last updated by subzopokatuff 7 hours, 5 minutes ago.
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/5(1).
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.Download