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(A) In the analysis of group $V$ cations,$(NH_4)_2CO_3$ is used as a group reagent in the presence of $NH_4Cl$ and $NH_4OH$.$NH_4Cl$ suppresses the io

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$Mg^{2+}$ ions will also be precipitated

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(A) In the analysis of group $V$ cations,$(NH_4)_2CO_3$ is used as a group reagent in the presence of $NH_4Cl$ and $NH_4OH$.$NH_4Cl$ suppresses the ionization of $(NH_4)_2CO_3$ due to the common ion effect,keeping the concentration of $CO_3^{2-}$ low enough to exceed only the solubility product $(K_{sp})$ of $Ca^{2+}$,$Ba^{2+}$,and $Sr^{2+}$ carbonates.If $Na_2CO_3$ is used instead,it is a strong electrolyte and dissociates completely to provide a high concentration of $CO_3^{2-}$ ions.This high concentration of $CO_3^{2-}$ exceeds the $K_{sp}$ of $MgCO_3$ as well,causing $Mg^{2+}$ ions to precipitate along with the group $V$ cations.

List-$I$ (Ion involved)	List-$II$ (Agent)
$(i) \, Ni^{2+}$	$(A).$ Sodium thiosulphate
$(ii) \, Ag^{+}$	$(B).$ Sodium nitroprusside
$(iii) \, Cu^{2+}$	$(C).$ Ammonia
$(iv) \, S^{2-}$	$(D).$ Dimethylglyoxime

Sodium Carbonate cannot be used in place of $(NH_4)_2CO_3$ for the identification of $Ca^{2+}$,$Ba^{2+}$,and $Sr^{2+}$ ions (in group $V$) during mixture analysis because

Similar Questions

Which ion$(s)$ precipitate when an oxalate solution is added to a mixture of $Ba^{2+}$,$Sr^{2+}$,and $Ca^{2+}$?

$A$ mixture of two salts is not water-soluble but dissolves completely in dilute hydrochloric acid to form a colourless solution. The mixture could be

Match List-$I$ with List-$II$ and select the correct answer using the codes given below.

List-$I$ (Ion involved) List-$II$ (Agent)

$(i) \, Ni^{2+}$ $(A).$ Sodium thiosulphate

$(ii) \, Ag^{+}$ $(B).$ Sodium nitroprusside

$(iii) \, Cu^{2+}$ $(C).$ Ammonia

$(iv) \, S^{2-}$ $(D).$ Dimethylglyoxime

Consider the following reactions:
$X(aq.) \xrightarrow{K_4[Fe(CN)_6]}$ Chocolate brown ppt.
$X(aq.) \xrightarrow{AgNO_3}$ White ppt. (insoluble in dil. $HNO_3$)
Then $X$ will be:

Which compound does not dissolve in hot dilute $HNO_3$?

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