alleryStart learning →Drying a sample by controlled heating to find its water content is an example of which method?
AA gravimetric analysis method
BA titration analysis method
CA combustion of the whole sample
DA precipitation reaction in water
Answer & Solution
Correct answer: A. A gravimetric analysis method
1. The sample is weighed, heated so the water evaporates, then weighed again.
2. The loss in mass is the mass of water that was present.
3. Because the result comes from mass measurements, this is a gravimetric method.
4. No titrant is added, so it is not a titration.
5. The sample is not burned in oxygen, so it is not combustion analysis either.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 4 "Stoichiometry of Chemical Reactions", section 4.5 Quantitative Chemical Analysis_
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