how do you find the standard electrode potentials of KMnO4 and MnCl2?
and is the standard electrode potential of MnO2 1.28?
In your text. In your notes? On the web?
MnO4^- + 8H^+ 5e ==> Mn^+2 + 4H2O is -1.51 volts.
MnO2 + 4H^+ + 2e ==> Mn^+2 + 2H2O is 1.23 volts in my tables.
To find the standard electrode potentials of KMnO4 and MnCl2, you will need to refer to a reliable reference table or database that provides these values. One such commonly used table is the "Standard Electrode Potentials" table in textbooks or online resources, which lists the standard electrode potentials for various redox reactions.
For example, you can look up the standard electrode potential of KMnO4 by searching for "Standard Electrode Potentials table" along with the specific compound in a search engine. Once you find a reliable reference, locate the entry for KMnO4 and identify the standard electrode potential value.
Similarly, you can find the standard electrode potential of MnCl2 by referring to the same table or database and locating the entry for MnCl2.
Regarding the standard electrode potential of MnO2, the value of 1.28 is not a standard electrode potential for MnO2. To obtain the correct value, you can follow the same process as mentioned above and refer to reliable sources such as chemical reference books or credible online databases that provide standard electrode potentials for various redox reactions.