SODIUM THIOSULPHATE AND HYDROCHLORIC ACID COURSEWORK EVALUATION

Conclusion In my investigation, my data and my graphs proved that my hypothesis was correct. Hypothesis My prediction is that the reaction between sodium thiosulphate and acid will be fastest when the acid is at its highest temperature and concentration. 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 chemistrysodium of the reaction. I would expect the same pattern of you swapped Sodium Thiosulphate and Hydrochloric Acid for two other chemicals, which are not affected by water, but will react with each other. Aim The aim is to investigate how changing the concentration of reactants can change the rate of reaction between hydrochloric acid and sodium thiosulphate.

The solution fizzes and gives off the gas carbon dioxide. The amount of time taken for the reaction to occur is known. My conclusion is valid because it includes evidence that my data is accurate and I have summed up my experiment in it. If you are confident and chosen the VARIABLE you coursework to investigate you should try to make a prediction reaction maybe justify it with some theory if you can. Click here to sign up. The flask is placed on the X board. I could have use a colorimeter to identify colour changes in the products.

Sodium Thiosulphate in Hydrochloric Acid.

Sodium thiosulphate and hydrochloric acid coursework conclusion

Variables An independent variable is one that is controlled by me, for example; the temperature, the time limit and mixing speed. We are trying to find out the affect of acid concentration on the rate of reaction, we are using 2, 1.

The size of the error bars is quite small so I think I can say that my data is quite accurate except for the 2M result which is quite a long error bar.

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In my evaluation I will comment on how reliable my results were and how. This shows that there is no real difference between the results. This can help me identify any faults. I did not swirl these together because I wanted to see the rate of reaction without any intervention.

I could have use a colorimeter to identify colour changes in the products. I will do so by timing the reaction of Sodium Thiosulphate with an acid.

Also, it has a narrow top and so it is safer. Dependent variables are not controlled by the experimenter.

Investigating the rate of reaction between sodium thiosulphate and hydrochloric acid

The rate of reaction is the speed of a reaction. In this investigation I will be varying the concentration of Sodium Thiosulphate only and not the Hydrochloric acid hydrochoric.

sodium thiosulphate and hydrochloric acid coursework evaluation

This shows that as you increase the independent variable the concentrationthe hydrochkoric variable the time taken for the experimentwent down. It is important for chemical businesses to know their rate of reactions because they need to know how long it takes to get their product as this influences the time and quantities they can produce. Firstly I would use different amounts and concentrations of both Hydrochloric acid and Sodium Thiosulphate. When you have decided on sodium method, give a detailed description of how you might carry it out.

The conical flask and all other equipment must be clean as any impurities may contaminate my experiment.

sodium thiosulphate and hydrochloric acid coursework evaluation

Hydrochloric acid is colourless, poisonous and highly acidic. This is because when there are more molecules in the solution, there are more molecules to collide so this will speed up the reaction, and therefore it is more likely hydrochlodic will collide with each other.

It is often used as a chemical intermediate and in petroleum production, food processing, pickling, and metal cleaning. 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.

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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 courseqork stayed the same.

(DOC) Sodium Thiosulphate in Hydrochloric Acid | Antonio Motta-Marques –

An input of heat energy is required to start some reactions. Click here to sign up. Reactions that happen quickly have a high rate of reaction. By Wenan Wen Han. If you are confident and chosen the VARIABLE you coursework to investigate you should try to make a prediction reaction maybe justify it with some theory if you can.

In this coursework, I will include background knowledge, prediction, safety, results, calculations, graphs, an analysis, conclusion and an evaluation. Investigating osmosis – coursework for biology includes prediction evaluation and results words – 4 pages membrane. The bars for 3M, 4m and 5M do not overlap.

An investigation into the factors affecting the rate of a reaction: In this coursework, I will include background knowledge, prediction, safety, results, calculations, graphs, an analysis, conclusion and an evaluation.

This causes a quicker reaction.