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    Hi,

    Can you please tell me if dilute hydroxide ions act as a base or as a ligand when, for example:

    [Cr(H2O)6]3+ + 3OH- ------> [Cr(H2O)3(OH)3] + 3H2O

    Can you also explain why? Thanks!
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    Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.

    You can also find the Exam Thread list for A-levels here and GCSE here. :dumbells:


    Just quoting in Puddles the Monkey so she can move the thread if needed
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    (Original post by Cadherin)
    Hi,

    Can you please tell me if dilute hydroxide ions act as a base or as a ligand when, for example:

    [Cr(H2O)6]3+ + 3OH- ------> [Cr(H2O)3(OH)3] + 3H2O

    Can you also explain why? Thanks!
    base, because the chromium is already six coordinate. The hydroxide ions in solution simply abstract protons from the attached water ligands, which have a weakened O-H bond due to the high charge density of the 3+ metal ion.
 
 
 
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