Would these be a redox reaction?
CaO(s) + H2O(l) = Ca(OH)2(aq)
2FeSO4(aq) + 3H2O2(aq) = Fe2O3(s) + 3H2O(l) + 2SO42-(aq)
#1 no.
#2 yes.
#1 is not a redox reaction because the charges don't change, however #2 would be because the charges do change and you can draw from it a reduction reaction and an oxidation reaction.
oops i meant the oxidation numbers...Sorry!!
To determine if a reaction is a redox reaction, you need to determine if there has been a transfer of electrons between the reactants. The general rule is that if there is a change in oxidation numbers for any of the elements involved in the reaction, then it is a redox reaction.
Let's examine the given reactions:
1. CaO(s) + H2O(l) = Ca(OH)2(aq)
To determine if it is a redox reaction, we need to assign oxidation numbers to each element. In calcium oxide (CaO), calcium has an oxidation number of +2, and oxygen has an oxidation number of -2. In water (H2O), hydrogen has an oxidation number of +1, and oxygen has an oxidation number of -2. In calcium hydroxide (Ca(OH)2), calcium has an oxidation number of +2, hydrogen has an oxidation number of +1, and oxygen has an oxidation number of -2.
By comparing the oxidation numbers of each element before and after the reaction, we can see that there is no change in oxidation numbers for any of the elements. Therefore, this reaction is not a redox reaction.
2. 2FeSO4(aq) + 3H2O2(aq) = Fe2O3(s) + 3H2O(l) + 2SO42-(aq)
Again, let's assign oxidation numbers to each element involved. In ferrous sulfate (FeSO4), iron has an oxidation number of +2, sulfur has an oxidation number of +6, and oxygen has an oxidation number of -2. In hydrogen peroxide (H2O2), hydrogen has an oxidation number of +1, and oxygen has an oxidation number of -1. In ferric oxide (Fe2O3), iron has an oxidation number of +3, and oxygen has an oxidation number of -2.
By comparing the oxidation numbers of each element before and after the reaction, we can see that there is a change in oxidation numbers. Iron is going from +2 in FeSO4 to +3 in Fe2O3, indicating a transfer of electrons. Therefore, this reaction is a redox reaction.
In summary:
1. CaO(s) + H2O(l) = Ca(OH)2(aq) - Not a redox reaction
2. 2FeSO4(aq) + 3H2O2(aq) = Fe2O3(s) + 3H2O(l) + 2SO42-(aq) - Redox reaction