cứu ahhhhhhhhhhhhhhhhhhhhhhhhhhhh

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cứu ahhhhhhhhhhhhhhhhhhhhhhhhhhhh

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    `(1)4FeS_2+11O_2 \overset(t^o)(->)2Fe_2O_3+8SO_2`

    `(2)2SO_2+O_2 \overset(t^o,V_2O_5)(->)2SO3`

    `(3)SO_3+H_2O->H_2SO_4`

    `(4)H_2SO_4+Fe->FeSO_4+H_2`

    `(5)FeSO_4->CuSO_4` không có PTHH

    `(6)CuSO_4+2NaOH->Cu(OH)_2+Na_2SO_4`

    `(7) Cu(OH)_2 \overset(t^o)(->)CuO+H_2O`

    `(8)CuO+H_2SO_4->CuSO_4+H_2O`

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