The Department of Science and Humanities Café Session

The Department of Science and Humanities had its fourth Departmental Café Session for the Academic Year 2021-22 on the June 25, 2022. The resource persons for the evening were Mrs. Gladys Da Silva, Assistant Professor (Chemistry) and Mrs. Samprita Ghadi, Laboratory Assistant, Don Bosco College of Engineering, Fatorda. A hands-on session on the topic ‘Hard Water Estimation’ was conducted.

    Mrs. Gladys began the session with an understanding of what constitutes hard water. She said , “salts of calcium and magnesium cause hardness in water. If only bicarbonates are present then it is temporary hardness. Even in tap water, there is some composition of mineral present. A permissible level of hardness in water is 200 parts per minute (ppm) which can extend up to 2000ppm.”

 An estimation of the hardness in water was tested in the Chemistry laboratory by carrying out simple titration experiment using Ethylenediamine tetraacetic acid (EDTA) and water sample with Eriochrome Black T indicator. Participants were paired together and Mrs. Samprita walked the participants through the step-by-step process of the experiments. Each pair conducted the experiment and was excited upon getting the results of the same. “It took us back to our school days,” said one of the participants, Mrs. Vaishali Parakhi. This interesting, exciting and interactive session was attended by 09 participants of the Department of Science and Humanities.