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Rates of Reaction

Catalysts - Enzymes - Biological Detergents.

Biological detergents and washing powders
use lipases and proteases to break down fat and protein molecules
from food stains which have remained on clothing.
The fatty acids, glycerol and amino acids which are produced
are removed in the water during the washing process.

The use of enzymes in detergents has the advantage
that effective washing can be carried out in warm water.
Warm water is preferable to hot water because
1) it is more energy
efficient
(you don't have to heat the water so much).
2) the dye in coloured clothing is less likely to wash out of the fabric.
3) clothes are more likely to stay the same shape
(hot water causes some fabric to shrink).

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