tmifan
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i don't really get what I could as a reagent...
Thanks
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yusyus
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look at halide and sulphate test
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charco
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(Original post by tmifan)
i don't really get what I could as a reagent...
Thanks
You are looking for an ionic compound that produced a precipitate with one and not the other, or maybe evolution of gas with one and not the other.

Think about the ions present in each compound under analysis...
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tmifan
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(Original post by charco)
You are looking for an ionic compound that produced a precipitate with one and not the other, or maybe evolution of gas with one and not the other.

Think about the ions present in each compound under analysis...
Would AgCl for the first question be correct?
White precipitate
No visible change


and

Ca2SO4 for the second be right?
White precipitate
No visible change
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charco
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(Original post by tmifan)
Would AgCl for the first question be correct?
White precipitate
No visible change


and

Ca2SO4 for the second be right?
White precipitate
No visible change
No, the reagent itself must be soluble.
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tmifan
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(Original post by charco)
No, the reagent itself must be soluble.
How would I make it soluble...?
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charco
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(Original post by tmifan)
How would I make it soluble...?
you can't make it soluble, it has to BE soluble.
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tmifan
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(Original post by charco)
you can't make it soluble, it has to BE soluble.
Nope. Don't get what I could use.
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charco
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(Original post by tmifan)
Nope. Don't get what I could use.
To test for chloride ions you add a soluble silver salt ...
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Droneon
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(Original post by tmifan)
Nope. Don't get what I could use.
You could use Potassium Iodide for the first one and sulfuric acid for the second one. They're both soluble.


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tmifan
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(Original post by charco)
To test for chloride ions you add a soluble silver salt ...
Siver nitrate? But thats in the question...
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charco
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(Original post by tmifan)
Siver nitrate? But thats in the question...
so reverse the question ...
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tangled23
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first one you could add nacl Therefore Agcl would form and this white ppt is insoluble
For second add sulfuric acid as bariumsulfate forms an insoluble white ppt and mgsulfate dissolves,
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tmifan
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(Original post by charco)
so reverse the question ...
i give up. i know that silver nitrate+nitric acid and chloride ions would produce a white ppt of AgCl.... that is it.
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TheTennisOne
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(Original post by tmifan)
i give up. i know that silver nitrate+nitric acid and chloride ions would produce a white ppt of AgCl.... that is it.

Could you not just use NaCl for the first one and get a white precipitate of AgCl with AgNO3 and then No Change with NaNO3
Then standard sulfate test H2SO4 + BaCl2 will give a white precipitate and no change with MgCl2
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tmifan
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(Original post by TheTennisOne)
Could you not just use NaCl for the first one and get a white precipitate of AgCl with AgNO3 and then No Change with NaNO3
Then standard sulfate test H2SO4 + BaCl2 will give a white precipitate and no change with MgCl2
(Original post by tangled23)
first one you could add nacl Therefore Agcl would form and this white ppt is insoluble
For second add sulfuric acid as bariumsulfate forms an insoluble white ppt and mgsulfate dissolves,
Ah thanks - they are both soluble. got it. lol.
how did you guys just know that...
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