Does your water contain enough oxygen?

Class IX students worked in a group to do a Deeper Learning project in Chemistry to spread awareness about water quality and to understand the importance of dissolved oxygen content in water. Water samples were collected from three different places along the Yamuna river and from the school aquarium. This was followed by a scientific analysis of the water quality and data was interpreted based on a comparison with the ‘Bureau of Indian Standard’ (BIS) values.
The students concluded that (1) the dissolved oxygen content varies in samples indicating their varying pollution levels; (2) the water sample collected from Wazirabad was found to be the most polluted due to its lowest dissolved oxygen content and (3) the school aquarium water was found to be safe for the survival of aquatic species.

Collection of  water samples from the School aquarium.

Assessing the oxygen level in the water samples.

Using the process of titration to measure levels of oxygen in 100 ml water samples.

Recording readings with the help of a burette.

Noting down the readings.

The final project presentation.