[kiwi8kiri]

Hi I am struggling to find an example of the reaction mechanism that would take place using sequential extraction.
I am trying to extract metals associated with carbonates such as ZnCO3 which reacts with sodium acetate CH3COONa, i am presuming the mechanism would be:

ZnCO3 + CH3COONa > ZnNa +CH3COONa + CO2

this isnt balanced and i dont think this is correct. Any ideas??

[Arkcon]

You can try balancing it if you want to.  Just adjust amounts on either side to find the lowest common denominator.  Of course, the reaction must make sense.  Do you get the evolution of carbon dioxide gas?  Do you actually observe an alloy of free sodium metal and zinc under your reaction conditions?  I wouldn't bother with balancing a reaction that doesn't exist.  What peer-reviewed reference source do you have for this reaction?  Or maybe textbook?  Or handbook?

[AWK]

ZnCO3 + CH3COONa 

This reaction is rather inmpossible. The reverse reaction (forming these reagents) every student of chemistry will do.

[kiwi8kiri]

I am struggling to determine a series of reactions that will take place using a sequential extraction method and wonder if someone can tell me if my reaction schemes are correct or where i can find information to help me figure this out:

1. Calcite + sodium acetate (buffered with acetic acid)

(CaCO3), + CH3COONa (CH3COOH)  > Ca(C2H3O2)2 + NaOH + CO2


2. Dolomite + sodium acetate (buffered with acetic acid) 

CaMg(CO3)2, +  CH3COONa ((CH3COOH))   > Ca(C2H3O2)2 +  Mg(C2H3O2)2 NaOH + CO2


3. Ferric hydroxide + 0.25M Hydroxylamine hydrochloride  Iron(II) + Water, Nitrogen gas and chloride.

Fe(OH)3 + HONH2·HCl  4H+ + 2H2O + N2 + 2Fe2+ + 2Cl-


4. Magnetite: Fe3O4(s) + 8 HCl(aq) → FeCl2(aq) + 2 FeCl3(aq) + 4 H2O


5. This reaction has the addition of sodium chlorate, HCl and HNO3

2ZnS + 2NaClO3 + 4HCl→2ZnCl2 + S0 + Na2SO4 + 2H2O + Cl2(g)