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17 cze 2023 · If you look at a 10 mL graduated cylinder, for example, the smallest graduation is tenth of a milliliter (0.1 mL). That means when you read the volume, you can estimate to the hundredths place (0.01 mL). You must use the bottom of the meniscus to determine the volume in the 10 mL graduated cylinder.
CHEMISTRY 11 – EXPERIMENTAL UNCERTAINTY OF APPARATUS WORKSHEET. (1) Record the values for the experimental uncertainty encountered in using the following apparatus: Apparatus. Difference between numbered divisions. # of unnumbered subdivisions between numbered divisions.
If you look at a 10mL graduated cylinder, for example, the smallest graduation is tenth of a milliliter (0.1mL). That means when you read the volume, you can estimate to the hundredths place (0.01mL). Use the bottom of the meniscus to determine the volume in the 10mL graduated cylinder.
12 cze 2008 · This page provides a table of typical uncertainty values for the calibrated volume of such glassware. Since these are based on the mean and standard deviation of the volumes delivered for a batch of glassware, they are treated as random errors .
The table given below lists the absolute uncertainties for some equipment used in the Chemistry lab. The absolute uncertainty expresses the margin of uncertainty associated with a reading, a measurement, or a calculation involving several readings.
Measured quantities have an associated uncertainty that is represented by the number of significant figures in the measurement. The uncertainty of a calculated value depends on the uncertainties in the values used in the calculation and is reflected in how the value is rounded.
To measure the volume of liquid in this graduated cylinder, you must mentally subdivide the distance between the 21 and 22 mL marks into tenths of a milliliter, and then make a reading (estimate) at the bottom of the meniscus. Refer to the illustration in Figure 1.
