Systematic or determinate errors, such as improper zeroing of the balance or poo
ID: 888622 • Letter: S
Question
Systematic or determinate errors, such as improper zeroing of the balance or poor calibration of the pipette, result in decreased accuracy. In order to induce the error in data set (1) in the precision-and-accuracy section of the introduction...a) ...would the balance be registering masses too low or too high? Explain briefly
b) ...would the pipette be delivering more or less than the graduations indiciate? Explain briefly the value to the correct value (i.e, how true are your measurements?). Only when we correct value we should obtain for a measurement can we conclude whether or not our actually accurate. The data and diagrams below illustrate this point. L.e., how true are your measurements?). Only when we know data is Le t's assume we would like to compare two different sets of apparatus we could use to determine urements obtained for water (data sets 1 and 2); the densities are given in gmL. Density Absolute Density Absolute Expt. 1 Run Deviation 2 Expt. 1 0.98 0.96 0.99 0.95 0.97 Deviation 1 0.01 0.01 0.02 0.02 0.00 0.06 / 5 = 0.01 Expt. 2 0.95 1.03 1.01 0.97 1.04 5.00 / 5 = 1.00 0.05 0.03 0.01 0.03 0.04 0.1615= 0.03 4.85 / 5 = Averages 0.97
Explanation / Answer
Since Density is less than correct value so mass registered by balance is too low because mass is directly proportional to density
Since Density is inversely proprtional to volume and calculated value is less than absolute value So the pipette is delivering more than that indicated by the graduations
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