Tuesday 6 January 2015

Understand the difference between Adsorption and Absorption

Understand the difference between Adsorption and Absorption. click on the link to Watch the VIDEO explanation: Watch Video

Something tee accidently falls while you are studying. What is the best way to remove it off immediately? Click on the right option. Yes. Now watch the tissue paper suck away the spill liquid quickly. If we have used ordinary paper the tea would not be completely absorbed. Tissue paper absorbs some liquid and ordinary paper adsorbs some liquid. How is it different? Let us learn more on them. Lets understand absorption and adsorption a little better. Absorption is the passage of one substance into or through the bulk of another medium. The absorbs substance press to saturate the whole of the medium to former solution. The mixing with other medium's environment is so well that one phase recognize its existence as separate entity. Adsorption is the adhesion or sticking together of molecules of a gas, liquid or dissolved solids, to the surface of a solid, or sometimes a liquid. The molecules are loosely held by the surface and can easily dropped off. Lets see difference between these processes. Absorption is seen in common day examples . Perfume spray is absorbed via skin. Crisp finger chips turn soaking because they have absorbed moisture from air. One substance is well soaked into different medium. What about adsorption. Here is a jar containing red dye dissolved in water. Look what happens solid palette of carbon is dropped into jar. Well isn't that a surprising. The red colour almost disappears in the jar. Why? The charcoal palette has minute pour on its surface that cause the colour particle stick to it. The red dye undergoes process of absorption. Shake or Warm this jar and look, you get back the red colour in jar. Adsorption can be simply reversed by heating and is transitory. When a substance is absorbed in a different medium it is called absorption. Usually absorption cannot be reversed by simple means although it may also be temporary. Focus on adsorption by carbon and its applications. One thing is deodorising air in refrigerator and decolourising sugar solution and controlling acidity. Activated charcoal in gas mask attracts toxic gas molecules allowing the person wearing the mask to breathe fresh air. Drag the carbon palette displayed here one by one and see what happens.

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