In this investigation, I try to find out whether temperature is able to affect the rate of diffusion, and I will be using potassium manganate (VII) crystals for my experiments.

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Diffusion is when the particles are moving randomly by colliding into each other, from an area of high concentration to an area of low concentration.

 

Aim 

        In this investigation, I try to find out whether temperature is able to affect the rate of diffusion, and I will be using potassium manganate (VII) crystals for my experiments.  

 

Prediction

I predict that temperature does affect the rate of diffusion. At first, when the potassium manganate (VII) is added in the water, the water will collide with the permanganate iron in the crystals. Then particles of the water and crystal move in a constant random motion and randomly distribute to allocate in different places. When the temperature of the water with potassium manganate crystals in increases, the particles in the water and crystal will then speed up and move around more quickly. Therefore it will take less time for the purple colour to spread out. As the heat energy is added to the particles of the water and crystal, the particles of the water will convert the heat energy into kinetic energy, which makes these particles move faster and the diffusion will speed up as well.

Variables

        

The followings are the things I have to keep the same and change, in order to obtain a fair test and reliable results, as well as trying to prevent inaccuracies:

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Apparatus 

The followings are the apparatus I need for my experiments:

 

(own choice – not necessary)

  • Glass Rod  

  • Kettle

Safety Aspects

        The chemical used in this experiment is potassium manganate (VII), which is a very strong oxidizing agent. If it is in contact with the skin, oxidization will take place and the skin will turn brown. Eventually, the skin will be pealed off of course. So if any potassium manganate (VII) spillage should be treated with a large amount of water. For safety precautions, Goggle has to be worn all the ...

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