What is the color of precipitates of AgI?
Correct answer: A. Yellow
- A. Yellow
- B. Light Yellow
- C. Brown
- D. Blue
Explanation
Silver iodide is a yellow precipitate because Ag+ reacts with I− to form the sparingly soluble compound AgI, which has a characteristic yellow colour. The likely alternative is light yellow, which students may confuse with the cream or pale shades associated with other silver halides such as AgBr.
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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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