Chemistry rate of reaction coursework sodium thiosulphate

Chemistry rate of reaction coursework sodium thiosulphate

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Home chemistry rate of reaction coursework sodium thiosulphate

The reaction between Sodium Thiosulphate and Hydrochloric Acid.

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To measure fluids in cm3.

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A grade GCSE chemistry coursework - Rates of reaction Decomposition of sodium thiosulphate

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The following theories proves to us that temperature, concentration, and surface area affect the rate of a reaction because.

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Rates of Reaction

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I can further test this by running my results through the formula for proportionality.

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Rates of Reaction - Hydrochloric Acid and Dodium Thiosulphate

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Apparatus Apparatus The apparatus I will use in this experiment are as follows:

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Chemistry Coursework - Sodium Thiosulphate

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I will also be careful when heating up the solutions and will at all times wear safety goggles and also remain standing throughout the experiment. I book comments that both concentration and energy are proportional because:

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I predicted that both variables would be proportional. Piece of paper with a cross marked on it that I used for my experiment.

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Fair Test The variables in this test are: There is a minimum amount of energy which colliding rste need in order to react with each other

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This variable is continuous but I shall not test it because it is hard to control the exact surface area of the two reactants as chemisty both come in an aqueous solution. The initial volume of water.

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Fair Test The variables in this test are:

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However because the computer is very accurate and because I also took results from another group, this will not pose too great a problem.

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All of the reactions happened at room temperature about C. This could be explained by the fact that she was using the optical method and so would be less accurate.

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Different reactions take place at different rate.

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I will use the same standard of procedure each time for judging when the cross has disappeared. In addition, in the solution there was plenty of particles so concentration wasn't important.

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Place the number in the blank below the substituent. Books, Literature, and Writing.

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Chemistry Rates of Reaction Coursework:

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Essay about Temperatures Influence on Reaction Rates - Temperatures Influence on Reaction Rates For my first preliminary experiment, I had to investigate the affect of temperature of sodium thiosulfate and hydrochloric acid against rates of reaction.

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It can be either fast or slow. Sign Up Sign In.

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I predicted that both variables would be proportional.

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Tools that I have used. In fact there was enough to support a much faster reaction than the one which occurred.

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After the experiment, I shall be able to draw a graph comparing concentration and reaction time.

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When using the light sensor I should have covered the underside of the sensor with black material rather than sticking on paper as this could have let in some light. I shall stop the watch when it is no longer possible to see the cross.

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I predict that as the concentration of the Sodium Thiosulphate doubles, the rate of the reaction will double. In some cases, like rising bread we have an actual chemical reaction where the yeast changes the food.

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This proportionality can be expressed using algebra thus: Here I recognise that degrees centigrade are not the most preferable units as 40 degrees doesn't give double the energy to 20 degrees.

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Although I predicted that concentration would have the greatest affect on the reaction rate, it was in fact temperature.

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From this evidence I believe my results were very reliable.

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For example I know that my evidence was very reliable because as you can see in the table above, my results were extremely similar to each other. The computer records light levels as a percentage of original levels against time and is much more accurate than using a stop watch.

There are different variables which can be changed. In the experiment we use hydrochloric acid which reacts with the magnesium to form magnesium chloride. The measurement of the change can take place in a single unit of time; it can take seconds, minutes, hours and even days.

The theory for the way the reaction occurs is called The Collision Theory. Method Firstly I will draw a small dark cross on a piece of paper and place it on a bench mat. It is clear that in general they follow the pattern set by my results although each time her reaction took a little longer. HubPages and Hubbers authors may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.

I will use the same standard of procedure each time for judging when the cross has disappeared. In order for my test to be a fair test I will have look out for the following things: Get feedback on grammar, clarity, concision and logic instantly.

In this particular investigation I am going to find out how heat affects the rate of reaction in the reaction of sodium thiosulphate with hydrochloric acid. If I was to do this experiment again I would make sure I repeat my experiment more times then I did to this one, so that I would have a higher level of accuracy, and this would be clearly displayed in the results.

As the reaction progresses, the sulphur will collect in the water and form a cloudy solution.

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