This increases the likelihood of reactants colliding properly and so increases the rate of the chemical reaction. Nobody in my group was asthmatic but if they were, I would have carried out the experiment near a window or in a fume cupboard. Repeat results and averages will be taken to improve the credibility of the findings, and present solid grounding for the final conclusion. Units of concentration are moles per cubic decimetre i. We did 4 experiments to find out how the rate of reaction changes with differing concentrations of Sodium Thiosulphate, Hydrochloric Acid and water. The amount of time taken for the reaction to occur is known as the reaction rate.

The dependent variable was the rate of reaction. Reactions that happen quickly have a high rate of reaction. Read more Rate of Reaction words, approx. Sodium Thiosulphate in Hydrochloric Acid. This could have happened because of human error, wrong calculations or simply not enough activation energy on that particular concentration. Sodium thiosulphate and hydrochloric acid coursework analysis The rate of reaction is the rate of loss of a reactant or the rate of development of a product during a chemical reaction.


Blue coloration turned to brick red precipitate. The solution fizzes and gives off the gas carbon dioxide. Read more Sonochemistry words, approx. Keep the size of my measuring flask is the same size; this should hopefully make my experiment much fairer and accurate.

Investigation Of Sodium Thiosulphate And Hydrochloric Acid – Essay – Words – BrightKite

Weigh the emptied bottle. The rate of a reaction is a measure of change that happens in a single unit of time. I drew 6 different graphs for this investigation. There are a few mild outliers.


sodium thiosulphate and hydrochloric acid coursework conclusion

How the rate of reaction changes in a reaction thjosulphate Hydrochloric Acid and Sodium Thiosulphate words – 4 pages Chemistry coursework: The results for 1, 2 and 4M keep showing outliers.

The points in the top right are quite far down so this shows a negative correlation. When calcium carbonate is added to hydrochloric acid a reaction takes place.

In order to perform the experiment, the following Apparatus must be used: The peak is at a higher energy. Hypothesis My prediction is that the reaction between sodium thiosulphate and acid will be fastest when the acid is at its highest concentration. I wrote down my results and then moved on to the next concentration of sodium thiosulphate. However, in chemical reactions, the challenge for most students is first to understand what is meant by chemical change.

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As an inert and stable thiosulphae, water was used to alter concentration of Sodium Thiosulphate without changing the end amount of solution. The purpose of this investigation is to record the amount of time taken for a reaction to occur when sodium thiosulphate is mixed with hydrochloric acid.

When the solution is made more concentrated, there are a greater number of molecules in the same space.

Investigation Of Sodium Thiosulphate And Hydrochloric Acid

I think that my method for my investigation is easy to follow. Ckursework example, rusting is a slow reaction; it has a low rate of reaction. This is good because I will instantly be able to see any change in the solution.

Units of concentration are moles per cubic decimetre i. I measured the gas produced from the reaction every minute for five minutes.


sodium thiosulphate and hydrochloric acid coursework conclusion

In my scatter graph with line of best fit, most of the points are close to the line. How can assignments spark excitement in students going to send requests to provide the blueprint for americas research universities. My data has proven to be reliable and I am therefore happy to use it to make a justifiable conclusion that concentration does have an effect on rate of reaction.

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This shows that there is no thjosulphate difference between the results. As soon as the chemicals were in, I started the timer.

These are circled on my graphs. 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.

Investigating the rate of reaction between sodium thiosulphate and hydrochloric acid

This is because when there are more molecules in the solution, there are more molecules to collide anr this will speed up the reaction, and therefore it is more likely they will collide with each other. The iodine formed in the reaction can then be titrated by means of a standard sodium thiosulfate solution.

We done this using 0.

sodium thiosulphate and hydrochloric acid coursework conclusion

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