Jawapan

2016-07-13T21:09:18+08:00
Volumetric flasks are used for precise dilutions and preparation of standard solutions it is calibrated to contain a precise volume at a particular temperature. Graduated cylinders are useful for measuring liquid volumes to within about 1%. They are for general purpose use, but not for quantitative analysis. greater accuracy is needed,then we use a pipet or volumetric flask.