which of the following pair is not distinguished by passing H2S?
Correct answer: A. Hg, Pb
- A. Hg, Pb
- B. Zn, Mn
- C. As, CD
- D. Cd , Pb
Explanation
Passing H2S precipitates both Hg2+ and Pb2+ as dark sulfides, so this pair is not readily distinguished by the colour of the initial H2S precipitates. The likely mistake is choosing Zn and Mn, but ZnS is white while MnS is flesh-coloured, making that pair distinguishable.
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About Solubility Product
The solubility product constant, Ksp, represents the equilibrium concentrations of ions from a sparingly soluble salt, each raised to its stoichiometric power. Problems involve writing Ksp expressions, calculating molar solubility, applying the common-ion effect and predicting precipitation from the ionic product.
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