Which reagent is used in the qualitative anal | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) In the qualitative analysis of inorganic salts,cations are classified into different groups based on their solubility products and the common ion

Vedclass · Accepted Answer

$H_2S$ in the presence of $NH_4OH$

Vedclass · Answer

(A) In the qualitative analysis of inorganic salts,cations are classified into different groups based on their solubility products and the common ion effect.Group $IV$ cations $(Co^{2+}, Ni^{2+}, Mn^{2+}, Zn^{2+})$ are precipitated as their sulfides.The reagent used for Group $IV$ is $H_2S$ gas in the presence of an ammoniacal solution (buffered with $NH_4Cl$ and $NH_4OH$).This provides a high concentration of $S^{2-}$ ions,which is necessary to exceed the solubility product of Group $IV$ sulfides.

List-$I$ ($Test$/$reagent$)	List-$II$ ($Radical$ $identified$)
$A$. Lake Test	$I$. $NO_3^{-}$
$B$. Nessler's Reagent	$II$. $Fe^{3+}$
$C$. Potassium thiocyanate	$III$. $Al^{3+}$
$D$. Brown Ring Test	$IV$. $NH_4^{+}$

Which reagent is used in the qualitative analysis of Group $IV$ cations?

Similar Questions

Which of the following ions forms a colored carbonate precipitate?

Which of the following pairs cannot be distinguished by passing $H_2S$ gas?

Consider the following reaction scheme: $D(\text{White ppt}) \xleftarrow{Na_2CO_3} A \xrightarrow[\text{in acetic acid}]{K_2CrO_4} B(\text{Yellow ppt})$ and $A \xrightarrow{dil.\ H_2SO_4} C(\text{White ppt})$. If $A$ is a metallic salt,then the white precipitate $D$ must be:

Which of the following can be used instead of $NH_4Cl$ in the analysis of group $III$ radicals?

Vedclass Test Series

Exam Paper Generator

Online Exam Module