A)why is most dirt not easily washed away by water? b)Why is the dirt can be removed when we use detergent?

Science homework please help.A)why is most dirt not easily washed away by water? b)Why is the dirt can be removed when we use detergent?
enzymes in the detergent A)why is most dirt not easily washed away by water? b)Why is the dirt can be removed when we use detergent?
Different 'dirts' have different staining effects on clothing. Blood, for instance, almost *requires* rinsing in cold water as soon as possible to successfully remove it from staining clothing. Loose, non-staining 'dirt' can easily be rinsed away by water, but if the 'dirt' has an oil or greasy component to it, it must first be attacked by a neutralizing hydrocarbon to turn the oily stain into one that a detergent can neutralize more completely.





How well a detergent can remove a stain depends upon the 'staying power' of the staining chemical makeup. Some stains (on white materials) require a strong bleaching solution to remove them. Other stains, such as, indelible marking ink, canNOT be removed.
water is poor solvent, dish detergent is creating small bobble each bobble pick-up one portion of dirt and caries it out to surface, like your plastic sandwich bag carie your launch.
Here is a web site that pretty much explains it: http://chemistry.about.com/od/howthingsw鈥?/a> ...Good Luck...