Multiple Choice
Read the length of the metal bar to the correct number of significant figures.
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2. Measurement and Problem Solving
Significant Figures: Precision in Measurements
Multiple Choice
What is the correct reading for the liquid in the burette provided below?
A
7 mL
B
7.0 mL
C
7.20 mL
D
7.00 mL
E
6.80 mL
Verified step by step guidance1
Identify the meniscus: The meniscus is the curve seen at the top of a liquid in response to its container. In a burette, you should always read the bottom of the meniscus.
Position your eye level: Ensure that your eye is level with the meniscus to avoid parallax error, which can lead to incorrect readings.
Determine the scale increment: Look at the markings on the burette to understand the scale. Each small division between the numbered markings typically represents 0.1 mL.
Read the meniscus: Observe where the bottom of the meniscus aligns with the scale on the burette. In this image, it appears to be slightly above the 32.2 mL mark.
Estimate the reading: Since the meniscus is between two markings, estimate to the nearest 0.01 mL. The meniscus appears to be slightly above 32.2 mL, closer to 32.26 mL.
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