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Experimental Error in Chemistry
Member rating: No Rating | Words: | Submitted: Tue Aug 19 2003
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Experimental Error in Chemistry In an experiment, when you make a measurement of whatever kind, you cannot be sure just how close it is to the true value, that is, how accurate it is. There is an experimental uncertainty (often called 'experimental error'). Experimental uncertainty arises because of: * Limits in the how exact the measuring apparatus is. This is the precision of the apparatus. * Imperfections in experimental procedures. * Judgements made by the operator. When can my results be said to be precise? If you repeat a measurement several times and obtain values that are close together, your results are said to be precise. If the same person obtains these close values, then the experimental procedure is repeatable. If a number of different people carry out the same measuring procedure and the values are close the procedure is reproducible. What is a systematic error? A systematic error is one that is...
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