Question

Why is it necessary to add only very small excess of stannous chloride during the reduction of fe3 to fe2?

Answer 1

Answer:

As dilute sulfuric acid is ideal for redox titration because it is neither an oxidizing agent and nor a reducing agent. HCL being a strong electrolyte dissociates in water to give H+ and Cl- ions. ... Hence ssome amount of KMnO4 is used up in oxidising Cl- to Cl2.

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