Question

why potassium permanganate makes a water purple in colour​

Answer 1

Potassium permanganate is a strong oxidizing agent, which means it has a tendency to take electrons from other chemicals. It dissolves in water to give purple solutions. If it is evaporated, it makes purple-black shiny crystals. It has a sweet taste and is odorless.

Appearance: black crystals; bright purple in solution

Other cations: Sodium permanganate

Answer 2

hey mate here is your answer :

This is an exothermal reaction and potassium is heated to sucg an extend that it burns a purple flame. Additionally , hydrogen released during the reaction strongly reacts with oxygen and ignites. Potassium reacts with water more slowly than does rubidium, which is placed under potassium in the perodic chart .

hope this helps u ..