Topic(s): Redox Reactions Which equation represents a redox reaction? AgNO_(3)+NaClarrow AgCl+NaNO_(3) PCl_(5)+4H_(2)Oarrow H_(3)PO_(4)+5HCl 3Fe+4H_(2)Oarrow Fe_(3)O_(4)+4H_(2) MgCO_(3)+2HClarrow MgCl_(2)+CO_(2)+H_(2)O

The equation that represents a redox reaction is: In this reaction, iron (Fe) is oxidized from 0 to +8 oxidation state, while hydrogen (H) is reduced from +1 to 0 oxidation state. This change in oxidation states indicates that it is a redox reaction.