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Which piece of glassware provides the most precise measurement based on significant figures?
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1. Intro to General Chemistry
Significant Figures: Precision in Measurements
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Which of the following best applies to reading the measurement of volume in a graduated cylinder?
A
Ignore the meniscus and read the nearest marked line.
B
Read the volume at the bottom of the meniscus at eye level.
C
Estimate the volume by looking from above the cylinder.
D
Record the volume at the top of the meniscus.
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Understand that when reading the volume in a graduated cylinder, the liquid surface forms a curve called the meniscus due to surface tension.
Recognize that the correct way to measure volume is to read the bottom of the meniscus, which is the lowest point of the curve.
Ensure your eye is level with the meniscus to avoid parallax error, which can cause inaccurate readings if viewed from above or below.
Avoid ignoring the meniscus or reading from the top of the curve, as these methods lead to incorrect volume measurements.
Therefore, always align your eye with the bottom of the meniscus and read the volume at the nearest marked line to get the most accurate measurement.
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