Which of the following cations does not give | vedclass

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(A) In a neutral medium,$H_2S$ acts as a reducing agent for $Fe^{3+}$ ions.The reaction is: $2Fe^{3+}(aq) + H_2S(g) \rightarrow 2Fe^{2+}(aq) + S(s) +

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$Fe^{3+}$

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(A) In a neutral medium,$H_2S$ acts as a reducing agent for $Fe^{3+}$ ions.The reaction is: $2Fe^{3+}(aq) + H_2S(g) \rightarrow 2Fe^{2+}(aq) + S(s) + 2H^+(aq)$.Since $Fe^{2+}$ ions do not form a precipitate with $H_2S$ in a neutral medium,$Fe^{3+}$ does not yield a metal sulfide precipitate.Conversely,$Cu^{2+}$,$Bi^{3+}$,and $Ag^+$ form their respective insoluble sulfides ($CuS$,$Bi_2S_3$,$Ag_2S$) in the presence of $H_2S$.

Which of the following cations does not give a precipitate with $H_2S$ in a neutral medium?

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