mass measurements of the crucible, lid, and sample are performed only at room temperature. why is this technique necessary for a gravimetric analysis?

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31-10-2022
Chemistry

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mass measurements of the crucible, lid, and sample are performed only at room temperature. why is this technique necessary for a gravimetric analysis?

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amman35 amman35 · Answer 1 · 2022-11-20T12:08:37-05:00

Mass measurements of the crucible, lid, and sample are performed only at room temperature because the heat from the crucible warms the surrounding air which rises then that air cools down and falls.

The process is necessary for gravimetric analysis as scales are calibrated at room temperature.

The heating is done so as the surrounding air is heated by the process of convection this will lead to inaccurate and unsteady readings which are rising and falling also heating is done in the crucible before heating is done so as to remove the air moisture.

Gravimetric analysis is a method of quantitative chemical analysis in which the constituent sought is converted into a substance that can separate from the sample and weighed.

Gravimetric analysis is dependent on accuracy so calibration is necessary as it maintains accuracy standardization and repeatability in measurements.

To learn more about gravimetric analysis

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