Question

Freshly precipitated aluminium and magnesium hydroxides are stirred vigorously in a buffer solution containing 0.25 mole/l of ammonium chloride and 0.05 mole/l of ammonium hydroxide. Calculate the concentration of aluminium and magnesium ions in solution:
$K_b$[NH₄OH] = 1.80 × 10⁻⁵
$K_{sp}$ [Mg(OH)₂] = 6 × 10⁻¹⁰
$K_{sp}$ [Al(OH)₃] = 6 × 10⁻³²

Answer 1

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