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Which of the following is a example of a irriversible change.
a)Disssolve salt in water
b)Freezing water
C)Mixing water-colour


Which do you think you can't separate? Can you separate salt after it is dissolved in water? I think I could evaporate the water and leave the salt behind.
Can water be melted after it is frozen?
Can water and a soluble dye be separated? Think of dyeing Easter eggs. Can you put the dry dye back into the box?

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