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Thiosulphate coursework

Firstly, my results give conclusive evidence that as the amount of Sodium Thiosulphate decreases and the amount of water in the solution there are less atoms to collide and therefore less successful collisions causing chemical change so the reaction rate is slower. In a more concentrated solution, there are more atoms to collide so the reaction time is quicker. Overall I think that this experiment was a success as I have proved that concentration does affect the rate of reaction, and I have also found that when the concentration is doubled the rate of reaction is not necessarily halved.

However I am restricted by time and the available facilities which means I cannot repeat it. Get Full Access Now or Learn more. See related essays. Get a clamp and tighten the burette so it stands upwards with nobody holding it- We use the clamp to hold the burette up. It makes the experiment much easier as you don't have to have someone standing there just holding it up 5. This means activation energy will not have an effect on this experiment, since there is not any form of a catalyst present to lower the activation energy a catalyst being a substance which increases the speed of a reaction without being changed or used up in the reaction.

As the experiment continues, the more yellow sulphur precipitate is formed, thus causing the solution to become opaque. Changing the concentration of a solution affects the rate of reaction. The concentration of a solution is how strong the solution is. Experiment: Method 4 is the overall method I will use as I consider it to be the best experiment to find out which Antacid is the strongest. Here is how to carry out the experiment, step by step: 1. Collect all the equipment which is needed- 1 x cm3 Beaker,.

The time it takes for the X to disappear is timed and recorded. The experiment is repeated using all the temperatures. In my investigation I do not propose to use a catalyst but if I did I would use the same mass. Size of particle surface area The surface area and the particle size also have an effect on the rate of reaction.

How catalysts work: The collision theory and enthalpy profiles help us to understand how catalysts work. In a chemical reaction, existing bonds in the reactants must first stretch and break. Then new bonds can form as the reactants are converted to products. Evidence of a chemical reaction might be a color change, a gas given off, or the formation of a precipitate. Want to read the rest? Sign up to view the whole essay and download the PDF for anytime access on your computer, tablet or smartphone.

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Extracts from this document Introduction Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid Coursework Aim Investigation, to find out how the rate of reaction between Sodium Thiosulphate and Hydrochloric acid is affected by changing the concentration. Middle We had to add the Sodium Thiosulphate and the water at the same time for this to be a fair test also. Conclusion Carrying out the experiment in a chemist lab which has more detailed technology available will make the experiment more reliable, accurate and will minimise the errors.

The time it takes for a reaction to happen in is known as the speed or rate of the reaction. The coursework entails investigating the rate of reaction between Sodium Thiosulphate and Dilute Hydrochloric acid and the effect of different variables on the reaction. When a reaction between Sodium Thiosulphate and an acid, a cloudy, yellow precipitate is formed. To see the time it takes a reaction to occur there will be a measure of the time it takes for the precipitate to occur.

A sudden colour change makes the time required for the iodine to be produced very obvious. This way the rate can be measured in concentration of iodine produced per unit time rather than just as a reciprocal of time. This is important because it enables me to work out the rate constant, k, in the rate equation which I will discuss later. The rate of reaction will be measured rather crudely by seeing how long it takes for the mixture of water and hydrochloric acid to cloud up the beaker and make a large 'X' under the beaker in which the solution will be placed unvisable.

The beaker will then placed on the marked paper. Next, the hydrochloric acid will be added to the Na2SO3 thiosulphate. The rate of the reaction can be determined by the calculating the amount of sulphur produced in the time recorded.

Adding up both orders of the reactants gives the overall order of the reaction. PART B To find out the effect of temperature on the rate of the reaction the time interval between the addition of HCl and the obscuring of the ink cross on white paper by the solid yellow sulphur precipitate at five different temperatures must be recorded.

It resembles sodium thiosulphate, Na2SO4, with one less oxygen atom and one more sulphur atom. The additional sulphur atoms can be driven out by an acid. This is changing the ratio of sodium thiosulphate to water. Dependant variable - factor to be measured: The time it takes for the cross to be fully out of vision will be measured to test the rate in which acid reacts with thiosulphate. Planning This experiment is to discover what affects rate of reaction.

In this experiment there are two solutions used, Sodium Thiosulphate and Hydrochloric Acid. Five of the most common ways to influence the rate of reaction can be explained using collision theory. They are: changing the nature of the reactants, changing the concentration of one or more of the reactants, changing the temperature at which a reaction is performed, changing the surface area of a solid reactant, adding a catalyst.

Watching the cross disappear as precipitation occurs and sulphur is formed as a solid will be the method used to realise the rate. When sodium thiosulfate is mixed with hydrochloric acid, a reaction takes place, leading to a precipitate of sulphur being formed.

This turns the solution cloudy. I shall use this clouding to investigate a factor that affects the rate of reaction, the factor being temperature. The collision theory states that chemical reactions only occur when reacting particles collide with each with sufficient energy to react. The minimum amount of energy required is called the activation energy. These reactions can occur at different speeds. In our experiment, we are going to alter the concentration of Sodium thiosulphate and see what affect this has on the rate of reaction.

My hypothesis is that the higher the concentration the faster the reaction will take place. Open Document. Essay Sample Check Writing Quality. Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid Aim Investigation, to find out how the rate of reaction between Sodium Thiosulphate and Hydrochloric acid is affected by changing the concentration. Introduction I must produce a piece of coursework investigating the rate of reaction, and the effect different changes have on them.

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Join over 1. Page 1. Save View my saved documents Submit similar document. Share this Facebook. Extracts from this document Conclusion From this, I can speculate that the experiment was conducted well, and that the results have only been affected by other variables by little or no amount. The above preview is unformatted text. Found what you're looking for? Not the one? Search for your essay title Close Your Eyes "Can I help you?

Science Coursework The basic theory is that the particles have to collide in order to react and they have to collide hard as well. Enzyme Coursework. See more essays. Over , pieces of student written work Annotated by experienced teachers Ideas and feedback to improve your own work.

Save Sign up now Want to read the rest? Read more The above preview is unformatted text. Looking for expert help with your Science work? Take me to free Study Guides. Get a clamp and tighten the burette so it stands upwards with nobody holding it- We use the clamp to hold the burette up. It makes the experiment much easier as you don't have to have someone standing there just holding it up 5. This means activation energy will not have an effect on this experiment, since there is not any form of a catalyst present to lower the activation energy a catalyst being a substance which increases the speed of a reaction without being changed or used up in the reaction.

As the experiment continues, the more yellow sulphur precipitate is formed, thus causing the solution to become opaque. Changing the concentration of a solution affects the rate of reaction. The concentration of a solution is how strong the solution is. Experiment: Method 4 is the overall method I will use as I consider it to be the best experiment to find out which Antacid is the strongest.

Here is how to carry out the experiment, step by step: 1. Collect all the equipment which is needed- 1 x cm3 Beaker,. The time it takes for the X to disappear is timed and recorded. The experiment is repeated using all the temperatures. In my investigation I do not propose to use a catalyst but if I did I would use the same mass. Size of particle surface area The surface area and the particle size also have an effect on the rate of reaction.

How catalysts work: The collision theory and enthalpy profiles help us to understand how catalysts work. In a chemical reaction, existing bonds in the reactants must first stretch and break. Then new bonds can form as the reactants are converted to products. Evidence of a chemical reaction might be a color change, a gas given off, or the formation of a precipitate.

Want to read the rest? Sign up to view the whole essay and download the PDF for anytime access on your computer, tablet or smartphone. Don't have an account yet? Create one now! Already have an account? Log in now! JavaScript seem to be disabled in your browser.

You must have JavaScript enabled in your browser to utilize the functionality of this website. Join over 1. Page 1. Save View my saved documents Submit similar document. Share this Facebook. Extracts from this document Introduction Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid Coursework Aim Investigation, to find out how the rate of reaction between Sodium Thiosulphate and Hydrochloric acid is affected by changing the concentration.

Middle We had to add the Sodium Thiosulphate and the water at the same time for this to be a fair test also. Conclusion Carrying out the experiment in a chemist lab which has more detailed technology available will make the experiment more reliable, accurate and will minimise the errors.

The above preview is unformatted text. Found what you're looking for? Not the one? Search for your essay title Chemistry Coursework - How the concentration effects the rate of reaction between sodium thiosulphate The aim of this coursework is to investigate the rate of reaction between sodium

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Extracts from this document Introduction. Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid Coursework Aim Investigation, to find out how the. Sodium Thiosulphate + Hydrochloric Acid Coursework Plan Aim I must produce a piece of coursework investigating the rates of reaction when Sodium. Find ❤️️ chemistry coursework sodium thiosulphate temperature ❤️️ www.​telas.smartautotracker.com ❤️️ Professional Essay Writing Service.