report - 1.INTRODUCTION The experiment is on measurement...

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1.INTRODUCTION The experiment is on measurement and data treatment. Therefore the main aim of this experiment is to calculate some values according to experimental observations and interpret these values. Interpretation of these values are going to give some results to make judgements. In other words;by evaluating these values one can compare theoretical value and experimental value. Besides,if there is no theoretical value to compare, one can compare reliability of two or more methods. The theoretical results are almost perfect. In experimental values there are some errors which are quite normal. In fact the other reason that this experiment is done is to determine the errors and sources of this errors during evaluation. Determination of error sources and evaluation of error is a part of analytical chemistry In analytical chemistry there are some errors defined. These are;systematic(determinate) error,random(indeterminate error),and gross error. Systematic errors are caused by instrumental errors,method errors, and personal errors. Systematic error is reason of data being very different from the true value. This type of error makes the result very high or very low which is not acceptable. Therefore if a person is careful when using the right method and the instruments are well working the systematic errors are not to be happen very often. The second type of error is random(indeterminate error).There are some unavoidable situations during experiments. And these situations are the main cause of random errors. And these sources are very hard to determine during the experiment. While systematic error are cause to affect the accuracy of results;random errors cause a change in the precision of the measurement. The third error is gross error. This type of error is mainly caused by humans. It doesn't happen very often;however,when it happens it causes result to be high or low. It is important to find error sources. Once the source is found it must be eliminated. However; this is not possible for all type of errors. During the measurement it is possible to get rid of systematic error. This is desirable. Therefore, there remain only random errors which causes the measurements to be around the mean value. These scattering gives possibility to have a Gaussian
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This note was uploaded on 05/01/2011 for the course CHE che 320 taught by Professor Ahmetarslan during the Spring '11 term at Middle East Technical University.

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report - 1.INTRODUCTION The experiment is on measurement...

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