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Silver's exception
While all the other cations you will come across at level two will form a hydroxide when reacted with NaOH, silver does not.
When silver reacts with hydroxide, the precipitate formed is Silver Oxide (Ag2O). Silver reacts with hydroxide according to the following equation:
2Ag+(aq) + 2OH-(aq) —> Ag2O(s) + H2O(l)