Color?

Chemistry Level 1

A task is given to a man.

  • Go to a room.

  • Put some clean water in a test tube.

  • Leave KMnO 4 \text{KMnO}_4 to that water.

  • Wait for some time.

What will be change in the color of the water?

Note: Assume we are considering room-temperature.

Orange Purple Green Red Blue Yellow No change

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1 solution

Matin Naseri
Jan 28, 2018

K M n O 4 \large{KMnO_4} is the chemical formula of Potassium permanganate.

If a solid sample of Potassium permanganate is placed in water, the water molecules will interact with the Potassium cations and the permanganate anions held in the crystal to break the ionic bonds that hold the crystal together.

This is a process of dissolving the crystal into solution. You will not be able to see the Potassium ions, but the permanganate ions are purple even in solution and you will see the water slowly darken (perhaps turning pink or violet first near the solid and finally taking on a uniform purple color).

Good problem Mr.shahriar

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