Quantitative Determination of Sulfate by Gravimetric Analysis

2007 Words Aug 16th, 2013 9 Pages
Quantitative Determination of Sulphate by Gravimetric Analysis

Table of Contents: 1. Synopsis

2. Objective

3. Theory
3.1: Summary
3.2: Technique
3.3: Chemicals
3.4: Instruments

4. Procedures
4.1: Precipitation of BaSO₄
4.2: Washing and Filtration of BaSO₄ Precipitate
4.3: Drying and Weighing of BaSO₄ Precipitate

5. Results and Calculations

6. Discussions

7. Conclusion

8. References

1. Synopsis:
This report is written about determining the quantitative amount of sulphate inside barium sulphate, BaSO₄, using the method of gravimetric analysis. This quantitative determination is done by the addition of a dilute solution of barium chloride slowly to a hot unknown sulfate solution
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The following instruments were used, were the 250ml beaker, the bulb filler and vacuum-assisted pipette, the measuring cylinder, the watch glass, the laboratory crucible, the vacuum pump, the hot air oven, the desiccator, and the digital analytical weighing balance.
The 250ml beaker is a cylindrical container with a flat bottom, which is used as a simple container to stir, heat, or mix various liquids.
The vacuum-assisted pipette is a hollow narrow cylinder that has a large bulge with a single graduation mark as it is calibrated for its specific volume, generally between 10ml, 25ml, and 50ml. The bulb filler is the simplest form of the pipette dispenser, using pinch valves to draw air within to create a vacuum within the vacuum-assisted pipette. The two pieces of laboratory equipment are generally used in conjunction with one another. The bulb filler is carefully inserted on top on the vacuum-assisted pipette. The pinch valves can be manipulated to draw the liquid inside the pipette.
The measuring cylinder is a narrow cylinder with a flat base that is used to measure amounts of liquid with the corresponding markings along the cylinder.
The watch glass is a circular, slightly convex-concave piece of glass that is generally used to evaporate a liquid, hold solids being weighed, or as a cover for the beaker.
The laboratory crucible is a cup-shaped piece of laboratory equipment

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