Chemical Principles I
Chemistry 217
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Experiment B4
Quantitative Determination of Phosphorus
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Isolating the phosphate preciptiate by filtration. |
This experiment centres on the chemical determination of percent phosphorus (%P) in a sample plant food by gravimetric analysis. The phosphorus is precipitated out of solution as a phosphate complex that can be weighed. Calulations can then be done to determine the amount of phosphorus in the original sample of plant food. |
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| Equipment List | Chemical List |
| funnel 150-mL flask 150-mL beakers 50-mL graduated cylinder filter paper spatula stir rod vial paper towels * |
10-52-10 plant food epsom salts (MgSO4 • 7H2O) household ammonia 2-propanol |
* Not included in the kit; must be provided by the student at home.
