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Cu + Fe(NO3)3 = ???
Posted: Mon Jan 15, 2018 7:57 am
by L34
Cu + Fe(NO3)3 = ???
electronic balance method. Help me! The reaction should go so that Fe changes its oxidation state from +3 to +2
Posted: Mon Jan 15, 2018 4:50 pm
by ChenBeier
Its simple.
Fe3+ + e- => Fe2+
Cu => Cu2+ +2 e-
KGV is 2
2 Fe3+ + 2 e- => 2 Fe2+
Addition and eliminierung of electrons
2 Fe3+ + Cu => 2 Fe2+ + Cu2+
The Nitrat is normaly spectactor ion.
Depending on pH it can also oxidies Cu and Fe2+
and will be reduced to NO.
NO3- + 4 H+ + 3 e- => NO + 2 H2O
Posted: Wed Jan 17, 2018 1:16 am
by phongphanp
Last equation is not clear such as electron , H from ?
Posted: Wed Jan 17, 2018 4:42 am
by ChenBeier
What is not clear. An iron-III solution is acidic in pH. So in small amount you will have HNO3, and this also will attack copper.
Fe3+ + H2O => FeOH2+ + H+