Question

Explain why HCl (aq) cannot be used to acidify KMnO4 (aq) while ur can be used to acidify K2Cr2O7 (aq).

Answer 1

HCL being a strong electrolyte dissociates in water to give H+ and Cl- ions. KMnO4 being a strong oxidising agent oxidises Chloride ion(Cl-) to Cl2. ... Hence more amount of KMnO4 is usedup which results in error in reading. The situation is completely the opposite with K2Cr2O7.

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