alleryStart learning →What defines a gravimetric analysis?
AMeasuring the volume of gas released by a sample
BMeasuring the colour intensity of a treated sample
CMeasuring the time a sample takes to fully react
DSeparating the analyte and then measuring its mass
Answer & Solution
Correct answer: D. Separating the analyte and then measuring its mass
1. A gravimetric method treats the sample so that the analyte changes physical state.
2. That change lets the analyte be separated from the rest of the sample.
3. Masses are then measured and combined with known stoichiometry to give the concentration.
4. Gravimetric methods were the first quantitative techniques and are still used today.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 4 "Stoichiometry of Chemical Reactions", section 4.5 Quantitative Chemical Analysis_
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