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2 cards from this section. Quick, good the night before a test.
Calculate the percentage uncertainty for a measurement of 100.0 mL with an uncertainty of ±0.2 mL.
Use the formula: (absolute uncertainty / measured value) x 100.
If a temperature is measured as 30.0 °C with an uncertainty of ±0.5 °C, what is the percentage uncertainty?
Remember to divide uncertainty by the measured value.
What is the formula for calculating percentage uncertainty?
Remember the relationship between uncertainty and measures.
True or False: A higher percentage uncertainty indicates a more precise measurement.
Think about what precision means in terms of measurements.
You measure a solution's concentration as 0.200 M with an uncertainty of ±0.002 M. Calculate the percentage uncertainty. Then combine this with a volume measurement of 50.0 mL (±0.5 mL) to find the overall uncertainty in the derived molarity for a reaction.
Remember to apply percentage rules correctly.
In a titration experiment, you measure a final volume as 15.00 mL (±0.04 mL). If the initial volume was 10.00 mL (±0.01 mL), calculate the percentage uncertainty for the difference in volume and interpret the precision of your measurements.
Analyze how uncertainties combine in subtraction.
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