Check all the ways listed below that ensure accurate reading of volume from a graduated pipette. tapping the base of the pipette
on the table using subtraction to determine the volume dispensed making sure that you read the volume with the liquid inside the pipette at eye level reading only the final volume of liquid after dispensing ensuring that air bubbles are not in the column of liquid inside the pipette
using subtraction to determine the volume dispensed.
making sure that you read the volume with the liquid inside the pipette at eye level.
ensuring that air bubbles are not in the column of liquid inside the pipette.
Explanation:
The pipette is a widely used laboratory material, and its main function is to transport precise quantities of liquid material. They are used, for example, in various medical examinations and in the study of molecular biology. There are several types, such as the graduated pipette, the volumetric pipette, the automatic pipette and also the micropipettes (for very small amounts of liquid). Using a pipette requires careful attention not to use wrong volumes of liquid to be used. For this reason, it is correct to say that when handling a pipette we must:
using subtraction to determine the volume dispensed.
making sure that you read the volume with the liquid inside the pipette at eye level.
ensuring that air bubbles are not in the column of liquid inside the pipette.
Most humans would associate the smell of the doctor's or dentist's with something bad or painful, when on the other hand baking cookies or having a nice smell of Thanksgiving can remind us of tasty food and comfort with family or just comfort in general.
