Chemistry Extended Essay Phosphorous

[chemistry93]

Okay, so I need urgent help on my chemistry extended essay. I am doing my extended essay on determining amounts of phosphorous in samples of water. Basically, I am not using any lakes,river etc to test ways of determining it but I am just using different PPM's of phosphorous to test if its an affective way of determining how much phosphorous is inside the water sample. Here is what I did:

Solution A: Dissolve 25 g ammonium molybdate, (NH4)6Mo7O24• H2O, in 300 ml distilled water.
Solution B: Dissolve 1.25 g ammonium metavanadate, NH4VO3, by heating to boiling in
300 mL distilled water. Cool and slowly add 330 mL concentrated HCl. Cool Solution B to room
temperature.
Pour Solution A into Solution B, mix, and dilute to 1 L. This solution will have a yellow color.

1. Prepare 100 mL of a 1-ppm standard by pipetting 1.00 mL of the 100-ppm P standard into a
100-mL flask. Dilute to 100 mL with distilled water. Repeat this procedure to prepare
3-, 5-, and 7-ppm standards.
a. Pipet 10 mL of the 1-ppm standard into a 25.0-mL volumetric flask.
b. Pipet 4.0 mL of the vanadate-molybdate reagent into this flask and dilute to 25 mL with
distilled water. Mix thoroughly.
c. Repeat with 3-, 5-, and 7-ppm standards.

Then I used the result to figure out how much the color changed with a colormiter. However, I don't really know where to go with my extended essay. In the introduction I could talk about how it harms our water because harmful algae will be formed. But then where do I go from there? Your help would be much appreciated. Because I have noo idea =(

 

[jbsteele]

For your extended essay, you can start by discussing the importance of understanding phosphorous levels in water for maintaining a healthy water environment, and how it can be used to prevent or reduce algal blooms. Then, you can explain the methodology you used for determining phosphorous levels in water samples and discuss the results of your experiments. You could also discuss the limitations of this method and the potential for improvement. For example, you could talk about other methods that could be used to test for phosphorous levels in water, such as spectrophotometry or ion chromatography. You could also discuss ways to further improve the accuracy of your method, such as using different reagents or different concentrations of standards. Finally, you could discuss the implications of your findings. How can this method be used to effectively monitor phosphorous levels in water? What are the implications of higher or lower phosphorous levels in water? How can this information be used to help protect our aquatic environment? I hope this helps! Good luck with your extended essay!