Engineering Chemistry Laboratory Practical
7. Estimation of total dissolved solids of a water sample by gravimetry
Chemistry (Lab) Practical
To estimate the amount of TDS present in 100 ml of a given water sample, you are provided with a water sample.
7. ESTIMATION OF TOTAL DISSOLVED SOLIDS OF A WATER SAMPLE BY
GRAVIMETRY
Expt.
No.
Date:
AIM
To
estimate the amount of TDS present in 100 ml of a given water sample, you are
provided with a water sample.
PRINCIPLE
A
well mixed water sample is filtered through a whattman filter paper. The
filtrate is evaporated to dryness in a preweighed porcelain dish. The crusible
is then dried to constant weight at 179 – 180°C. The increase in crusible
weight represents the total dissolved solids.
MATERIALS
REQUIRED
1.
Porcelain dish 2. Desiccator 3. Analytical balance 4. Hot air oven 5. Water
bath 6. Whattman filter paper 7. 100 ml standard flask 8. 20 ml graduate
pipette
PROCEDURE
A
empty porcelain dish is washed and drired in a hot air oven at 180°C. It is
then cooled in a desiccator and weighed in an analytical balance. Let its weight
be W1 gms.
The
given water sample is filtered through whattman filter paper. 50 ml of the
filtered water sample is taken in a porcelain dish and kept in an oven,
maintained at 105°C, for drying. Drying is done for 1 to 2 hours till the
porcelain dish (sample) attain the constant value.
The
porcelain dish is cooled in a desiccator and weighed carefully. Let its weight
be W2 gms.
RESULT
Engineering Chemistry Laboratory Practical : Tag: : Chemistry (Lab) Practical - 7. Estimation of total dissolved solids of a water sample by gravimetry
Related Topics
Related Subjects
Physics and Chemistry Laboratory
BS3171 Practical Experiment 2021 Regulation | 1st Semester Common to all Dept 2021 Regulation