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the apparatus shown below is filled with water and slightly Evelated on 1 side . a small crystal of pottasium permanganate is placed on the other side. illustarte the flow of convection current when the appuratus is heated from below as shown |
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Answer» tion:When a piece of Potassium permanganate (KMnO₄) is added to or placed at the bottom of a BEAKER which contains cold water, then the water turns into a purple COLOURED solution.1. The colour of the solution is dark purple after 5 mins of the addition of the KMnO₄ piece to the water. This is due to diffusion of the KMnO₄ particles in the water.2. After several hours, the colour of the solution may change to a purple shade that is lighter than the initial colour.3. This is because the solution of water and KMnO₄ is made up of very tiny particles which get DISPERSED and spread amongst themselves. When the KMnO₄ particles are together, they give a dark purple colour. As they get dispersed in the water, the purple particles will spread making the solution lighter in colour.4. The 2 processes that are taking place in this experiment are diffusion and dispersion. |
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