Respuesta :
Answer:
B) Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) is redox reaction.
Explanation:
A Redox reaction is a reaction in which two simultaneous effects occur, the oxidation of a reducing agent and the reduction of an oxidizing agent.
The oxidizing agent is that chemical element that tends to capture these electrons, leaving a state of oxidation lower than it had, suffering a reduction.
The reducing agent is that chemical element that supplies electrons to the medium, increases its oxidation state, that is, it oxidizes.
because:
A) 4Li(s)+O2(g)→2Li2O(s) is a combination reaction
B)Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) is a redox reaction
C)Pb(NO3)2(aq)+Na2SO4(aq)→PbSO4(s)+2NaNO3(aq) is a Ion-exchange reaction
D)HBr(aq)+KOH(aq)→H2O(l)+KBr(aq) is an acid-base reaction
Answer:
4Li(s)+O2(g)→2Li2O(s)
Mg(s)+Cu2+(aq)→Mg2+(aq)+Cu(s)
Explanation:
Li is the reducing agent
O2 is the oxidizing agent
Cu2+ is the oxidizing agent
Mg is the reducing agent
