Why should we calibrate the burettes and get the constant weight of glasswares before doing an analysis?
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Answer:
All of this is done to ensure that the analyses are correct in their measurements. Constant weight is indicative of the weight of the instrument. Typically, instruments adsorb water from the environment and it changes the initial weight and may invalidate any results obtained.
Calibration of a burette is done to ensure that the burette delivers a specified amount of solution. If the burette calibaration is off and you obtain results, they are probably invalid.
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