If metal ions of groups III are precipitated by `NH_(4)Cl` and `NH_(4)OH` without prior oxidation by conc. `HNO_(3)`....... is not completely precipit
If metal ions of groups III are precipitated by `NH_(4)Cl` and `NH_(4)OH` without prior oxidation by conc. `HNO_(3)`....... is not completely precipitated.
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