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Gravimetric Analysis of Sulfate in Lawn Food
Summary: Provides the details of an experiment involving the Gravimetric Analysis of Sulfate in Lawn Food. The purpose of the experiment is to determine the amount of sulfur (as sulfate) in a sample of lawn food. Provides experiment questions and a discussion of the results.
To determine the amount of sulfur (as sulfate) in a sample of lawn food.
Introduction
As sulfates easily form precipitates with suitable metal cations, a gravimetric method based on this feature is a common way to analyze the content of sulphur (as sulfate). The usual metal ion used to form such a precipitate is barium, because barium sulfate has a very low solubility.
The equation for this reaction is:
SO4 (aq) + Ba Cl2 (aq) -> Ba SO4 (s) + Cl2 (aq)
Apparatus
electronic balance
beaker
stirring rod
Filter funnel and filter paper
distilled water
Heating equipment
sample of lawn food
- M hydrochloric acid
- 5M barium chloride solution
- An empty beaker was accurately weighed. 1.13 g of lawn food sample (ground up) was poured into a 400 mL beaker and was accurately weighed and recorded.
- 100 mL of distilled water was added to the beaker and the sample was allowed to dissolve...
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This section contains 1,135 words (approx. 4 pages at 300 words per page) |
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