The conversation between human and AI assistant.
Why is the colour of KMnO4 purple before the titration and after the end point it is pink?
Can you explain why the color of KMnO4 is purple before the titration and then becomes pink after the end point?
Sure! The color change of KMnO4 from purple to pink is due to the reduction of MnO4- ions to Mn2+ ions. This happens during the titration when the KMnO4 reacts with the substance being titrated.