IODINE CLOCK COURSEWORK EXAMPLE

The graph on the trend line shows a linear correlation showing that the increase amount of volume of potassium iodide added to the mixture will increase the rate of reaction. Using syringes make up the following mixtures in five dry cm3 beakers. This result is backs up the collision theory1 that states in order to show a positive increase in the rate of reaction, the amount of collision must also increase. Error Change in Temperature Problem The room temperature increased as the lab was conducted affecting the lab speeding up the reaction when the temperature increased. Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email. Starch- Indicator When starch is left in mixture for a long period of time, it starts to degrade and will take longer for the reaction to be seen affect the time taken.

This result is backs up the collision theory1 that states in order to show a positive increase in the rate of reaction, the amount of collision must also increase. Measure 5 cm3 of hydrogen peroxide into a syringe. Solutions Keep the temperature of the room constant by turning of the aircon before the lab starts, and checking the room temperature as the lab is being done 1 BBC GCSE Bitesize: As seen in the graph, the line of best fit does not successful go through the first point 5,0. Stirring Swirling motion Keep constant of the stirring motion, by using a magnetic stirring rod when the potassium iodide is added so it does not affect the rate of reaction. As seen in the graph there is a positive correlation between the volume Concentration of the potassium iodide and the rate or reaction. By clicking “SEND”, you agree to our terms of service and privacy policy.

We will write a custom essay sample on Iodine Clock Reaction: Repeat steps 2 to 4 with each of the remaining solutions Note: Haven’t found the Essay You Want? How About Make It Original? As seen in the graph, the line of best fit does not successful go through the first point 5,0.

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Carefully swirl the reaction mixture in the beaker from time to time. As seen in the graph there is a positive correlation between the volume Concentration of the potassium iodide and the rate or reaction.

Describe any sources of error in your experiment. The stirring motion was not kept iodinne and affects the time it takes for the potassium iodide to react with sodium thiosulphate as the rate of reaction would increase when the swirling motion is quick.

During the lab, the temperature of the room increased resulting in a faster reaction changing the correlation between the rate of reaction and the volume usage.

Give a valid conclusion to this experiment with an explanation. We’ll occasionally send you account related and promo emails.

Starch- Indicator When starch is left in mixture for a long period of time, it starts to degrade and will take longer for the reaction to be seen affect the time taken. Measure 5 cm3 of hydrogen exampel into a syringe. Between every test, the starch used should be a fresh batch or to make sure to preserve the starch used for the experiment.

A series of experiments will be carried out in which only the concentration of the iodide ions will be varied. Eric from Graduateway Hi there, would you like to get an essay?

Solutions Keep the coursewori of the room constant by turning of the aircon before the lab starts, and checking the room temperature as the lab is being done 1 BBC GCSE Bitesize: In courseework to to increase to coirsework of collision, having more volume of potassium iodide increasing the concentration there is more chance of collision resulting in a faster rate of reaction.

Apparatus and Chemicals selection of syringes cm3 glass beakers white tile timer distilled water 1 mol dm? The aim of this experiment is to find the effect of varying the concentration of iodide ions on the rate of reaction between hydrogen peroxide and an acidified solution of potassium iodide. Both the sulfuric acid and hydrogen peroxide solutions irritate the eyes.

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Iodine Clock Reaction: Concentration Effect Essay

Add it to mixture 1 as quickly as possible and at the same time start the timer. There are also random errors such as the change of temperature. The graph on the trend line shows a linear correlation showing that the increase amount of volume of potassium iodide added to the mixture will increase the rate of reaction. Let us create the best one for you! There is clursework possible way to change the speed of reaction as it is a human flaw, therefore using a more precise instrument ipdine be more appropriate for the lab.

This could be due to systematic errors such as the reaction time of the student.

iodine clock coursework example

Using syringes cloco up the following mixtures in five dry cm3 beakers. Overall, these systematics and random errors do not influence the majority of the lab result as it continues to back up the collision theory and highlights the relationship between the rate of reaction and the concentration of the potassium iodide. What is your topic?

As the iodine molecules are produced they immediately react with the thiosulfate ions and are converted back to iodide ecample If there is too much of the concentration added to the mixture, the rate of reaction will be faster and if too little of the potassium iodide is added, it reacts at a slower place.

Iodine Clock Reaction: Concentration Effect Essay Example | Graduateway

Measurement Since it is not possible to eliminate exapmle error margins of an instrument, it would be wiser to increase the precision of the instrument instead.

By clicking “SEND”, you agree to our terms of service and privacy policy. Describe ways of improving your experiment in order to reduce the errors you mentioned above.

iodine clock coursework example