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leena19
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Homework Statement
You are supplied with a mixture consisting of barium carbonate,dolomite,potassium carbonate and silicon dioxide.Explain how you would attempt to determine quantitatively each of the constituents present in this mixture
Homework Equations
The Attempt at a Solution
First I Weigh the mixture.
Then,since potassium carbonate would dissolve in water as all group 1 compounds are soluble, I first add water,and filter.The filtrate contains dissolved potassium carbonate,which I dry,weigh and calculate its % composition
To the residue I add HCl,so the SiO2 remains which i later dry and weigh?
and in the filtrate I get CaCl2,MgCl2and BaCl2.
I don't know how to proceed from here.I'm tempted to add NaOH,but then all 3 i.e,Ca(OH)2,Ba(OH)2 and Mg(OH)2 would precipitate,and I wouldn't be able to separate them?
Thank you