4. Ba(NO3)2 + FESO4 → Fe(NO3)2 + BaSO4 - 5. SrCl2 + _Al(NO3)3 > Sr(NO3)2 + _AlCl3 6. Саз (РOa)2 + Na2CO3 → NazPO4 + СаСОз 7. Fe(NO3)2 + _Mg > _Mg(NO3)2 + Fe -

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