Which ion is not precipitated by both HCl and | vedclass

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(A) In qualitative inorganic analysis,$Pb^{2+}$,$Ag^{+}$,$Sn^{2+}$,and $Cu^{2+}$ are all classified as Group $I$ or Group $II$ cations.$Ag^{+}$ is pre

Vedclass · Accepted Answer

$Pb^{2+}$

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(A) In qualitative inorganic analysis,$Pb^{2+}$,$Ag^{+}$,$Sn^{2+}$,and $Cu^{2+}$ are all classified as Group $I$ or Group $II$ cations.$Ag^{+}$ is precipitated as $AgCl$ by $HCl$ (Group $I$).$Pb^{2+}$ is precipitated as $PbCl_2$ by $HCl$ (Group $I$) and as $PbS$ by $H_2S$ (Group $II$).$Cu^{2+}$ and $Sn^{2+}$ are precipitated as sulfides by $H_2S$ in the presence of $HCl$ (Group $II$).However,the question implies which ion is not precipitated by the combination of $HCl$ and $H_2S$ under standard conditions. All listed ions are precipitated by these reagents in their respective groups. Given the standard options,there is a technical error in the question as all these ions are precipitated by these reagents. If we assume the question asks for an ion that does not belong to these groups,none of the options fit. However,if this is a multiple-choice question where one must be selected,it is likely flawed. Based on standard analytical chemistry,all these ions are precipitated.

Which ion is not precipitated by both $HCl$ and $H_2S$?

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