Fertiliser (1 Viewer)

[horndog huang 2]

Hi all, i would like some to explain how to do this q and perhaps fertiliser questions in general. I just cant get my head around those. Thankd

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[Suu]

It's a gravimetric analysis question.
I find that this website has explained how to do these fertiliser questions pretty well:
http://www.easychem.com.au/monitoring-and-management/manufactured-products/sulfate-experiment

Basically, Barium Chloride reacts with Sulfate to form Barium Sulfate, which comes in the form of a precepitate.
From there, Mass of Sulfate/ Mass of Barium Sulfate * Amount of Barium Sulfate = Mass of Sulfate. From there, you can find the percentage of Sulfate in the Fertiliser.
Cheers

 

[jorie]

Jesus

 

[ProdigyInspired]

I just did an assignment on this and mainly used Shah's and other reports.

Here's how I set it out.
Consider how much sulphate SO4 is in Barium Sulfate, so mm(SO4)/mm(BaSO4) = ??%
Therefore the mass of SO4 is found through ??% x Mass (Barium Sulfate)
Then mass of SO4 / mass of fertiliser x 100 = percentage of sulphate in fertiliser.

My answer - 45.9% correct? Try it yourself.

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