Suppose we want to know whether on mixing h2o2 with fe+2,the oxidation of fe+2 to fe+3 will take place or not.
I would look up the reduction potentials in a table and calculate E for the proposed reaction.
It will take place because I know it and I am in 7th grade studying 12th-grade chemistry.
To determine whether the oxidation of Fe+2 to Fe+3 will occur when mixing H2O2 with Fe+2, we need to assess the redox potentials of these species. Redox potential is a measure of the tendency of a species to undergo reduction or oxidation.
Here's how you can determine whether Fe+2 will be oxidized to Fe+3 in the presence of H2O2:
1. Identify the redox potential for the Fe+2 to Fe+3 oxidation half-reaction. You can find this information in a standard reduction potential table or a database. The standard reduction potential for the Fe+2 to Fe+3 reaction is +0.77 V.
2. Determine the redox potential for the decomposition of H2O2. The reduction potentials for H2O2 can vary depending on the reaction conditions, but under standard conditions, it typically decomposes according to the half-reaction: H2O2 + 2H+ + 2e- → 2H2O. The standard reduction potential for this reaction is +1.77 V.
3. Compare the redox potentials. The redox potential of the reaction involving H2O2 decomposition (+1.77 V) is higher than the oxidation potential of Fe+2 to Fe+3 (+0.77 V).
4. Based on the redox potential comparison, it can be concluded that Fe+2 will be oxidized to Fe+3 in the presence of H2O2.
In summary, the oxidation of Fe+2 to Fe+3 will occur when mixing H2O2, as the redox potential of H2O2 is higher than that of Fe+2 to Fe+3.