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1. $Ag^+$ (Silver nitrate) |
$Br^-$ $+$ $Ag^+$ $\longrightarrow$ $AgBr$ - Yellowish-white, cheesy precipitate - Sensitive to light - Insoluble in $HNO_3$ - Insoluble in $NH_3$ Two essential modes of complex formation: $AgBr+2CN^-\rightarrow [Ag(CN)_2]^-+Br^-$ (->dicyanoargentate) $AgBr+2S_2O_3^{2-}\rightarrow [Ag(S_2O_3)_2]^{3-}+Br^-$ (->bis(thiosulfato)argentate) |
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2. $Cl_2$ (+$CH_3Cl$) |
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$2Br^-+Cl_2$ $\rightarrow $ $2Cl^-+Br_2$ (-> red-brownish bromine) |
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3. conc. $H_2SO_4$ |
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With dry bromides formation of $HBr$, which partially dissociates under heat (-> red-brownish bromine) |