Why hcl is added before h2s in second group detection?
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Why HCl is added before H2S gas during qualitative analysis of second group radicals. ... The concentration of sulphide ions is suppressed by HCl due to common ion effect. The already present H+ ions suppress the dissociation of H2S by moving the reaction in the backward reaction.
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The concentration of sulphide ions is suppressed by HCl due to common ion effect. The already present H+ ions suppress the dissociation of H2S by moving the reaction in the backward reaction.
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