Why is it necessary to pre-rinse volmetric glassware with sloutions it has to contain
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it is necessary to pre-rinse volumetric glassware with the solutions to be measured. because In volumetric glassware if we leave a few drops in the bottom it will change the concentration of the solution you are reacting. This may have an effect later down the line if you intend to do calculations. Also the water will react with the sodum hydroxide.
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