Equipment:A potassium permanganate crystal,six large test tubes,tweezers,a plastic transfer pipette,a test tube rack,10ml measuring cylinder.
Method;
1.put all your test tubes in your test tube rack fill one with 10ml and all the rest with 5ml of water.
2.with your tweezers add one crystal of potassium in the test tube that has 10ml wait for the crystal to dissolve.
3.then get 5ml of the mixture from the 10ml tube and put it in the tube next to then get 5ml of that one and put it in the next one and so on.
here is a photo our one is not the best example
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