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Chemistry ANions test

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can somebody please help me with this question fast cuz I have my Chem atp paper on the 25th.In the test to find out if sulphate ions are present in a precipitate we add dil. nitric acid and then aq. Barium nitrate.I wanted to ask if we can add aq Silver nitrate instead of barium nitrate cause all nitrates are water soluble.Please someone help me! :(
 
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Re: Chemistry Cations test

First of all these are anions... Yeah all nitrates are soluble but silver nitrate is used for the Chloride test not for Sulphate test...
 
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Re: Chemistry Cations test

Oh yeah,sorry,got confused.But I don't see the reason why we can't use silver nitrate since all nitrates are soluble :Search:
 
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Re: Chemistry Cations test

We can use others but these are the ones taught... For others then the observation may change... And we don't know about each and every compound...
 
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Adzy1794 said:
can somebody please help me with this question fast cuz I have my Chem atp paper on the 25th.In the test to find out if sulphate ions are present in a precipitate we add dil. nitric acid and then aq. Barium nitrate.I wanted to ask if we can add aq Silver nitrate instead of barium nitrate cause all nitrates are water soluble.Please someone help me! :(
If you use silver nitrate, silver sulphate will be formed upon reaction which is soluble is water (colourless solution), so how will you be able to know that sulphate ions were initially present in the solution by visual observation? You have to use barium nitrate because it gives a white precipitate of barium sulphate when it reacts with sulphate ions, thereby indicating the presence of sulphate ions. :)
 
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it is not about the nitrates, it is about barium.
this test is used so that barium sulfate is formed which is insoluble.
this barium sulfate is the white precipitate that is formed indicationg the presence of sulfate anions.
i think u could use lead or calcium nitrates because their sulfates are insoluble too.
 
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