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    when u add sodium hydroxide to copper and you see a blue jelly then when you add excess you still see blue jelly does that mean a precipitate has been formed? if yes how and if not can someone tell me an example of a precipitate being formed
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    I'm assuming you mean adding NaOH to Cu2+(aq), rather than Cu(s).

    A precipitate of Cu(OH)2(s) forms, which is not soluble in excess OH-.
 
 
 
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