To Determine the Dissolved Oxygen in Water Flashcards
1
Q
What indicator is used in this titration?
A
Starch indicator.
2
Q
Why is a wet bottle used?
A
To stop bubbles of air from sticking to the sides.
3
Q
Why is the bottle filled and stoppered under water?
A
To ensure no bubbles.
4
Q
Why is conc. MnSO4 and alkaline KI added using a dropper under water?
A
To prevent reaction with O2 in air or the introduction of air.
