[filip jovic]

hello,
for my thesis i have to determen the iron percentage in a sample using gravimetry. i know this is a homogeneous precipitation, but i dony know the theory behind this, can someone explain this to me and how to do it in the lab.

[chenbeier]

1. You get weight of your sample.
2. Dissolve it in water, acid, etc.
3. Do a chemical reaction by adding something that the iron precipitate
4.Filter it and dry it
5. Get weight of it, calculate to Fe
6. Quotient of this weight to sample weight times 100 gives percentage

[filip jovic]

thank you for the instructions. but can you explain the theory behind it, i have to give the theory aswell but i dont re&ally understand it that well

[AWK]

Search textbooks, handbooks, and original literature. Maybe even the internet will help.

[filip jovic]

Hello,
I have to determine the iron3+ in a monster. The procedure is: i have to take 0,800 gram of my monster, add 50 ml water and 2 ml HCl then i have to heat it till boiling point then add 1 ml HNO3. And lengthen it to 200 ml. Then i have to add 20 ml NH3 very slowly. Etc..

My question is what is the theory behind this particular precipitation. Can someone explain this to me. It is for my thesis

[mjc123]

What's your monster? King Kong? Godzilla? We need to know in order to explain the theory.

Seriously though, if you're writing a thesis, a elementary part of the work for your thesis is to learn the theory behind what you're doing. We're not here to do your work for you. Anyway, how much theory is there behind a precipitation? You make something insoluble, it precipitates.

[filip jovic]

can someone explain fully the theory of Gravimetric analysis.

[billnotgatez]

This is a question that is complex
Try this WIKI
Gravimetric analysis
https://en.wikipedia.org/wiki/Gravimetric_analysis

Come back with what parts you do not understand and your thoughts

[billnotgatez]

I have merged all your threads on this topic since they are all similar.

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