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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: Alberto_Kravina on May 02, 2006, 04:12:38 PM

Title: What gravimetric analysis have you tired?
Post by: Alberto_Kravina on May 02, 2006, 04:12:38 PM

I haven't performed many gravimetric analysis yet ;), here a small list of the ones that I performed:

1.)Determination of w(FeSO₄) of FeSO₄p.a.
Result: 99.2%
Result with Reinhard-Zimmermann method: 99.01%

2.)Determination of w(Fe) of magnetite.
Result: 68.23%
Result with Reinhard-Zimmermann method: 65.03%. :(  :-[

3.)Determination of w(FeSO₄) of an iron sulfate used to preciptate phosphates in water purification plants.
Result: w(FeSO₄) = 88.68%
Result with Reinhard-Zimmermann method: 88.21%

4.)Determination of w(Fe) of steel.
Result: 98.79%
Result with Reinhard-Zimmermann method: 98.50%

5.)Determination of w(NaCl) of NaClp.a.
Result: 99.45%
Result with Mohr method: 99.91%

6.)Determination of Beta(NaCl) of seawater.
Result: 30,16 g/L
Result with Mohr method: 28.93g/L

7.)Determination of w(NaCl) of thawing salt.
Result: 94.78%
Result with Mohr method: 95.00%

8.)Determination of w(NaCl) of a mixture of NaCl and Na₂SO₄
Result: 40,56%
Result with Mohr method: 40.06%

9.)Determination of w(Ni(NO₃)₂) of Ni(NO₃)₂p.a.
Result: 99.30%

10.)Determination of w(Ni) of a Chromium-Nickel steel.
Result: 14,68%

11.)Determination of w(CaCl₂) of CaCl₂p.a.
Result: 99.10%

12.)Determination of w(CaCO₃) in a sample of marmor (I stole the sample from my dad's mineral collection ;D, Don't tell him I did ....shhhhh.... ;) )
Result: 92,16%
I analyzed the same sample with acid-base titration (back titration): Result: 92.68%

13.)Determination of w(CaSO₄*2H₂O) in a mineral.
Result: 90,34%

14.)Determination of w(K₂O) of a fertilizer.
Result: 12,6%

15.)Determination of w(Na₂SiO₃) of a sodium silicate solution.
Result: w = 5,30%

16.)Determination of w(Pb(NO₃)₂) of Pb(NO₃)₂ p.a.
Result: 98.54%

17.)Determination of w(C) of a sample of coal.
Result: 99.10%

18.)Determination of w(Al) of a sample of Bauxite.
Result: 49.91%

19.)Determination of w(MgO) of a sample containing MgO
Result: 54.65%

Well, that's all, but I think that it's enough ;)

I would be curious to know which ones you performed...

Edit: added resluts with Mohr/Reinhard-Zimmermann method

Title: Re: What gravimetric analysis have you tired?
Post by: kevins on May 16, 2006, 11:03:18 PM

Determination of gypsum purity (CaSO4*2H2O) in FGD product.
Result= <99%.

Determination of S in coal by BaCl2
Result = 0.3%

Determination of suspend solid in water and waste water

  :)

Title: Re: What gravimetric analysis have you tired?
Post by: billnotgatez on May 19, 2006, 03:59:36 AM

Did you mean: Mohr method

Title: Re: What gravimetric analysis have you tired?
Post by: Alberto_Kravina on May 20, 2006, 11:36:22 AM

Bill: Yes, thanks for making notice me this typing mistake, already corrected :)

Title: Re: What gravimetric analysis have you tired?
Post by: mookxi on June 02, 2006, 02:14:41 AM

Determination of sulfur as sulfate in lawn food, only just one  :P

Title: Re: What gravimetric analysis have you tired?
Post by: elmyhalily13 on February 18, 2007, 02:17:16 AM

Hello fellas... I haven't try many gravimetric analysis before. What i have tried is only the Mohr method. Does anyone knows how many methods are there for gravimetric analysis?

Title: Re: What gravimetric analysis have you tired?
Post by: alhemicar on March 26, 2008, 02:27:43 PM

I tried Ni and Zn together,
Ba,
Fe.

I'm not so impressed with gravimetric analysis  ;D

Title: Re: What gravimetric analysis have you tired?
Post by: sarang_pen on January 04, 2010, 12:17:19 AM

hi...
I want to know How to determine AL-IN bauxite