Mounting the electrode
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8
￭￭￭￭￭￭￭￭
is too high, then air bubbles will be aspirated. These may result in incor-
rect measured values. If the stirring rate is too low, then the solution is
only mixed slowly and the reaction time or titration time increases accord-
ingly.
In order for the measurement to be taken in a well-mixed solution after
the addition of the titrant, the titration tip should be positioned where tur-
bulence is high. Furthermore, the distance between the addition of the
titrant and the electrode should be as large as possible. Therefore, take
into account the stirring direction (counterclockwise or clockwise) when
positioning the electrode and titration tip.
1
2
3
1
2
3
a)
b)
Figure 3
Diagrams showing rod stirrer, electrode and titration tip dur-
ing a titration. a) clockwise stirring direction, b) counterclock-
wise stirring direction.
1
Rod stirrer
2
Electrode
3
Titration tip
