Question

What hydroxide concentration is required to

  1. initiate precipitation of Al3+  from a 2.90x10-2  M solution of Al2(OH)3? The solubility-product constant for Al(OH)3  is 3x10-34.

     M

  2. lower the Al3+ concentration in the foregoing solution to 4.20x10-7 M?

     M

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