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- https://chem.libretexts.org/Bookshelves/General_Chemistry/Chem1_(Lower)/03%3A_Measuring_Matter/3.02%3A__The_Meaning_of_MeasureThe "true value" of a measured quantity, if it exists at all, will always elude us; the best we can do is learn how to make meaningful use of the numbers we read off of our measuring devices. The othe...The "true value" of a measured quantity, if it exists at all, will always elude us; the best we can do is learn how to make meaningful use of the numbers we read off of our measuring devices. The other kind of numeric quantity that we encounter in the natural sciences is a measured value of something– the length or weight of an object, the volume of a fluid, or perhaps the reading on an instrument. Although we express these values numerically, it would be a mistake to regard them as the kind of
- https://chem.libretexts.org/Ancillary_Materials/Worksheets/Worksheets%3A_Analytical_Chemistry_II/Error_and_Propagation_of_ErrorIf the bull’s eyes below represent obtaining an accurate result in a chemical analysis, mark each of the diagrams below with markings that represent the accuracy and precision of repeated trials descr...If the bull’s eyes below represent obtaining an accurate result in a chemical analysis, mark each of the diagrams below with markings that represent the accuracy and precision of repeated trials described. Although it cannot be completely eliminated, the effect of the other type of error on the quality of data can be minimized by doing one simple (though sometimes time-consuming) thing. The Class B pipette has a tolerance of 0.04 mL and the Class A pipette has a tolerance of 0.01 mL.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Quantifying_Nature/Significant_Digits/Propagation_of_ErrorPropagation of Error (or Propagation of Uncertainty) is defined as the effects on a function by a variable's uncertainty. It is a calculus derived statistical calculation designed to combine uncertain...Propagation of Error (or Propagation of Uncertainty) is defined as the effects on a function by a variable's uncertainty. It is a calculus derived statistical calculation designed to combine uncertainties from multiple variables, in order to provide an accurate measurement of uncertainty.
- https://chem.libretexts.org/Ancillary_Materials/Worksheets/Worksheets%3A_Analytical_Chemistry_II/Propagation_of_Error_in_Solution_PreparationPractical Exercise in Uncertainty Apply addition, subtraction, multiplication, and division rules to propagate uncertainty. Plan how to prepare a solution in lab with optimal accuracy. You are tasked ...Practical Exercise in Uncertainty Apply addition, subtraction, multiplication, and division rules to propagate uncertainty. Plan how to prepare a solution in lab with optimal accuracy. You are tasked with preparing 100 mL of a 0.0010 M solution from a 1.0 M stock solution. Develop a plan that minimizes the overall uncertainty in concentration. You have access to Class A volumetric flasks, Class A transfer pipets, and Hamilton micropipets.
