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1. Calculate the pH at the equivalence point for the titration of 0.230 M methylamine (CH3NH2) with 0.230 M HCl. The Kb of methylamine is 5.0× 10-4.

2. The Ksp of nickel(II) hydroxide, Ni(OH)2, is 5.84 × 10-16. Calculate the solubility of this compound in g/L.

3. Above what Fe2 concentration will Fe(OH)2 precipitate from a buffer solution that has a pH of 8.20? The Ksp of Fe(OH)2 is 4.87×10-17.

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