(A) The complex $[Cu(CN)_4]^{3-}$ is highly stable,so it does not provide enough $Cu^{2+}$ ions to exceed the solubility product of $CuS$ when $H_2S$

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There is a yellow precipitate due to $CdS$.

(A) The complex $[Cu(CN)_4]^{3-}$ is highly stable,so it does not provide enough $Cu^{2+}$ ions to exceed the solubility product of $CuS$ when $H_2S$ is passed.Conversely,$[Cd(CN)_4]^{2-}$ is less stable and dissociates to provide sufficient $Cd^{2+}$ ions.These $Cd^{2+}$ ions react with $H_2S$ to form a yellow precipitate of $CdS$ $(Cd^{2+} + H_2S \rightarrow CdS \downarrow + 2H^+)$.

Class 11 Chemistry 6-2.Equilibrium-II (Ionic Equilibrium)Solubility product

$Cu^{2+}$ and $Cd^{2+}$ are distinguished through the formation of complexes $[Cu(CN)_4]^{3-}$ and $[Cd(CN)_4]^{2-}$ when $H_2S$ gas is passed. Which of the following is correct?

A
There is a yellow precipitate due to $CdS$.
B
There is a black precipitate due to $CuS$.
C
There is a blue precipitate due to $CuS$.
D
There is a precipitation of $CuS$ and $CdS$ together.

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6-2.Equilibrium-II (Ionic Equilibrium)

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Solubility product

For a sparingly soluble salt $MX_4$,the molar solubility is $S$ (mol/$L$) and its solubility product is $K_{sp}$. Determine the relationship between $K_{sp}$ and $S$.

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The sulphide ion concentration $[S^{2-}]$ in a saturated $H_2S$ solution is $1 \times 10^{-22} \ M$. Which of the following sulphides should be quantitatively precipitated by $H_2S$ in the presence of dilute $HCl$?
Product Sulphide Solubility $(K_{sp})$
$I$ $1.74 \times 10^{-16}$
$II$ $1.2 \times 10^{-22}$
$III$ $8.2 \times 10^{-46}$
$IV$ $5.0 \times 10^{-34}$

Product	Sulphide Solubility $(K_{sp})$
$I$	$1.74 \times 10^{-16}$
$II$	$1.2 \times 10^{-22}$
$III$	$8.2 \times 10^{-46}$
$IV$	$5.0 \times 10^{-34}$

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For a metal hydroxide with an oxidation state of $+3$,the solubility is $1 \times 10^{-5} \ mol/L$. What is its solubility product $(K_{sp})$?

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At $25\,^{\circ}C$,the solubility product of $Mg(OH)_2$ is $1.0 \times 10^{-11}$. At which $pH$ will $Mg^{2+}$ ions start precipitating in the form of $Mg(OH)_2$ from a solution of $0.001\, M\, Mg^{2+}$ ions?

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If the solubility of salts $M_2X$,$QY_2$,and $PZ_3$ is the same $(S < 1)$,what is the relationship between their solubility products $(K_{sp})$?

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$Cu^{2+}$ and $Cd^{2+}$ are distinguished through the formation of complexes $[Cu(CN)_4]^{3-}$ and $[Cd(CN)_4]^{2-}$ when $H_2S$ gas is passed. Which of the following is correct?

Similar Questions

For a sparingly soluble salt $MX_4$,the molar solubility is $S$ (mol/$L$) and its solubility product is $K_{sp}$. Determine the relationship between $K_{sp}$ and $S$.

For a metal hydroxide with an oxidation state of $+3$,the solubility is $1 \times 10^{-5} \ mol/L$. What is its solubility product $(K_{sp})$?

At $25\,^{\circ}C$,the solubility product of $Mg(OH)_2$ is $1.0 \times 10^{-11}$. At which $pH$ will $Mg^{2+}$ ions start precipitating in the form of $Mg(OH)_2$ from a solution of $0.001\, M\, Mg^{2+}$ ions?

If the solubility of salts $M_2X$,$QY_2$,and $PZ_3$ is the same $(S < 1)$,what is the relationship between their solubility products $(K_{sp})$?

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