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Potato sample that was cut to size was placed into test tube and clamped to retort stand. 4. 10ml of hydrogen peroxide was poured carefully into test tube with potato sample

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Introduction

3. Potato sample that was cut to size was placed into test tube and clamped to retort stand. 4. 10ml of hydrogen peroxide was poured carefully into test tube with potato sample. 5. Stopper was placed immediately on top of test tube as soon as hydrogen peroxide was poured. 6. Reaction was timed for 5 minutes. 7. The above steps were repeated but this time potato cubes of different sizes were cut: one was 1/2 x 1/2 x 1/2 cm and the second one was 1/4 x 1/4 x 1/4 cm. 8. Finally all the above steps were repeated to conduct a REPEAT experiment to ensure accuracy of results. 9. Control experiment was conducted where no potato sample was placed in test tube and reaction was recorded. Control Experiment The control of the experiment was when there was no potato sample placed into test tube for the reaction to tae place. Control experiment was conducted for comparison of results. ...read more.

Middle

of the meniscus when measuring the amount of oxygen produced (eye-level should be directly level with the meniscus and not be viewed at an angle). Another limitation that arose for our group experiment was the rubber tubing attached to the stopper. There appeared to be holes in the tube which prevented the production of the gas, oxygen. Other problems that arose were the unexpected results that were recorded in comparison to other group results as evident in the table of results recorded for the class. Group 4's results were outliers in comparison to other results. Reasons for this could be from experimental errors such as incorrect conduction of experiment (such as not fully filling up the measuring cylinder with water where oxygen is collected) or incorrect reading of meniscus. As for the accuracy of data, my group conducted two tests to determine accuracy of data. The data that was recorded for my group was very accurate as the results attained were very close readings to each other and this is evident in the table of results for the group results. ...read more.

Conclusion

In the case of other forms of research teachers can provide background information about the topic to teachers and set a certain criteria so that the students know what is expected of them. Another different approach towards research could be that the assignment be assigned to individuals and not groups so that the one person is ensured to do all the research and not rely on others. Conclusion From the observations made on the experiment on 'the investigation of increasing surface area on the rate of reaction' , it is correct to state that: there is faster rate of reaction or (the rate of reaction is increased) with increasing surface area. A greater surface area means that more surfaces are exposed in smaller cubes (in smaller cubes, for e.g.2[1/2 x 1/2 x 1/2 cm cubes ]have greater surface area than a cube measuring 1 x1x 1cm) even though they are the same volume, as reaction can take place faster on smaller surfaces and thus, more oxygen is produced. Therefore, all the above proves that my hypothesis was correct when I hypothesized "that the higher the surface area the quicker the reaction will take place". ...read more.

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