5
ESTIMATION OF DISSOLVED OXYGEN IN THE GIVEN WATER SAMPLE
AIM
To estimate the amount of dissolved oxygen present in the given water sample.
METHOD
Winkler’s method.
PRINCIPLE
The given sample is treated with manganous sulphate followed by alkaline iodide. First, manganous sulphate reacts with potassium hydroxide resulting in potassium sulphate and manganous hydroxide.
Manganous hydroxide thus formed reacts with the dissolved oxygen present in the sample and forms manganic hydroxide.
Manganic hydroxide thus formed reacts with potassium iodide in ...
Get Engineering Chemistry now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
