The oxidizing agent potassium permanganate can be used to analyze the percentage of iron (II) present in iron tablets. Below is the ionic equation, showing the ions that participate in the reaction: MnO4- + 5 (Fe)2+ + 8 H+ → (Mn)2+ + 5 (Fe)3+ + 4 H2O

a) What does H + indicate about this reaction? b) Describe the color change.
c) What is the reducing agent in this reaction? d) How can you understand if the iron (II) has acted?
e) Write the half-equation for the oxidation of iron.​