suggest why some metals react with hot water and not cold water
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The reason for using cold water rather than hot water for the reactions of alkalimetals is that alkali metals are already reactive enough at room temperature. Even fairly small lumps of potassium will burn if you put them in cold water soimagine what it would be like with hot water.
incredibleahad:
i asked hot water instead of cold water. this the complete opposite answer
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Metals like aluminium, iron and zinc do not react either with cold or hot water. But they react with steam to form the metal oxide and hydrogen.
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