Question

question 3
to dispense the liquid, you hold the digital pipette
a) vertically
b) horizontally
c) at 10 - 40°
d) 90°
e) the angle of the pipette is not important
chem 1120: introduction to chemistry techniques
iclickers

Explanation:

When using a digital pipette to dispense liquid, it should be held vertically. This ensures accurate volume dispensing as gravity acts straight down, and the internal mechanisms (like the piston in a positive displacement pipette) work as designed. Holding it horizontally or at an angle can cause issues such as leakage (if held horizontally, liquid might flow into the piston area in some pipette types) or inaccurate volume delivery (as the calibration is typically for vertical use).

Answer:

A. Vertically