Tejas Asked a Question
June 28, 2020 12:50 pmpts 30 pts
Why are group 4 salts not precipitated when group 2 test is carried out (on addition of H2S) in salt analysis?
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  • Shivaji khadake
    Hello Student Solubility product of sulphides of II group radicals are less than solubility product of sulphides of IV group. So to pricipitate II group radicals as sulphides litt...
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    Suman Kumar
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  • Suman Kumar Best Answer
    See H2S is a weak acid. It will dissociate very weakly but Nh4Oh will help it in more dissociation. This reaction will be in forward direction
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    Tejas
    NH4OH increase ph of solution (Ph of solution greater than pka of H2S) and hence H2S exist as S2- in solution....
  • Dinesh khalmaniya 1
    hope this will help you šŸ™
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  • Dinesh khalmaniya 1 thankyou
    Solubility product of sulphides of II group radicals are less than solubility product of sulphides of IV group. So to pricipitate II group radicals as sulphides little S2-are suffi...
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  • Suman Kumar thankyou
    Solubility product of sulphides of II group radicals are less than solubility product of sulphides of IV group. So to pricipitate II group radicals as sulphides little S2-are suffi...
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    Tejas
    how's ionization of H2S favoured by NH4OH?