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Soap lather and suds

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Susan Mary | 11:02 Fri 14th Apr 2006 | Science
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Why is it that cold water seems to get rid of soap suds more quickly than hot water?
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I think one factor is temporary hardness in the water. Temporary hardness is found in limestone or chalk areas and is calcium bicarbonate in the water. Heat breaks down this compound into calcium carbonate (limescale) and carbon dioxide.

Hot water is less hard than cold water. Hardness in the water reacts with the soap and destroys the foam.


17:06 Fri 14th Apr 2006
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Soap is a by-product of oil.the hotter oil becomes the thinner it becomes,therefore the futher it spreads and the more flexable it is.secondly the bubbles will contain hot air, hot air rises cold air falls,the hotter bubles rise and stay longer.
22:49 Mon 17th Apr 2006

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