Question

Give the oxidation number (charge) of P in H3PO4= 

Give the oxidation number (charge) of O in H2O2= 

Directions: In each of the following equations, indicate the element that has been oxidized and the one that has been reduced. 

2 Na + FeCl⬇2 = 2 NaCl + Fe

2 C⬇2H⬇2 + 5 O⬇2 = 4 CO⬇2 + 2 H⬇2O

2 PbS + 3 O⬇2 = 2 SO⬇ 2 + 2 PbO

2 H⬇2 + O ⬇2 = 2 H⬇2 O

Cu + HNO⬇3 = CuNO ⬇ 3 + H⬇2

AgNO⬇3 + Cu = CuNO⬇3 + Ag

Answer 1

+5.

-1.

oxidized: Na, C, S, H2, Cu.

Fe, O2, H, Ag.