Answer to Question #56392 in General Chemistry for tracy guido
Zn + 2 HCl = H2 + ZnCl2
3Zn + 8HNO3 = 3Zn(NO3)2 + 2NO + 4H2O
2 Cu + 2 H2O = 2 CuOH + H2
Cu + 2 HCl = CuCl2 + H2
3 Cu + 8 HNO3 = 3 Cu(NO3)2 + 2 NO + 4 H2O
2 Fe(s) + 6 HCl(aq) = 2 FeCl3(aq) + 3 H2(g)
All the indicated metals in the reaction with water and hydrochloric acid displace hydrogen.
In the reaction with the nitric acid all the indicated metals produce nitrates and lead to the nitrogen oxide formation.
This behavior corresponds to their relative position in the periodic table.
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