SATHEE: Equilibrium Question 289

Equilibrium Question 289

Question: The sulphide ion concentration $[S^{2 -}]$ in saturated $H_{2} S$ solution is $1 \times 10^{- 22} .$ Which of the following sulphides should be quantitatively precipitated by $H_{2} S$ in the presence of dil. $H C l$ Sulphide Solubility Product (I) $1.4 \times 10^{- 16}$ (II) $1.2 \times 10^{- 22}$ (III) $8.2 \times 10^{- 46}$ (IV) $5.0 \times 10^{- 34}$

Options:

A) I, II

B) III, IV

C) II, III, IV

D) Only I

Show Answer

Answer:

Correct Answer: B

Solution:

Basic radicals of group II & IV are precipitated by $H_{2} S$ in the form of their sulphides. IInd group in acidic medium & IV group in alkaline medium. They precipitate when ionic product increases than solubility product.

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Equilibrium Question 289

Question: The sulphide ion concentration [S2−] in saturated H2S solution is 1×10−22. Which of the following sulphides should be quantitatively precipitated by H2S in the presence of dil. HCl Sulphide Solubility Product (I) 1.4×10−16 (II) 1.2×10−22 (III) 8.2×10−46 (IV) 5.0×10−34

Options:

Answer:

Solution:

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