ThE aDvANtagE OF mr.S-o-a-P
Sunday 22 January 2012 | 23:40 | 0 comments
korang nak taw dak kelebihan sabun dlm khidupan kite????ce angguk2 pala!!huhu...meh cni nk cte...
firstly because soap is easily broken down by bacteria.they are biodegradable.next is,soap does not pollute rivers and lastly you all must know soap is not poisonous.
but........something you all should know is soap have a problem...there are two problem...firstly-fats and oil for making them are quite expensive.secondly-they form a scum with hard water :-0 because hard water contain dissolved calcium and magnesium salts...the magnesium and calcium ions in hard water react with soap to form insoluble white precipitates.these precipitates are generally called scum
puhhhh!!bowink....okey2 let look the example first :
-> sodium palmitate will ionise to form sodium ions and palmitate
ions.
->the palmitate ions will react with calcium to form calcium palmitate..
.
cal;cium palmitate is a percipitate and will form a scum.
->the palmitate ions will also react with magnesium to form magnesium palmitate...
magnesium palmitate is a percipitate and will also form the scum.
so.......the soap will have to react with all the calcium and magnesium ion before it can begin the cleansing action on the clothes to be washed.that is soap is wasted to remove the hardness of water.the scum that is formed will also stick to the clothes.this will make the washed clothes look dirty also.However my dear fren...soap will be more useful when soft water is used.this is because soft water does not contain magnesium and calcium ions.Soap is also less effective in acidic water...1)acidic water contains hydrogen ions..2)the hydrogen ions react with soap ions to form fatty acids...3)the fatty acid does not have an ionic head.therefore it cannot perform cleansing action.4)fatty acid does not dissolves in water.there it cannot wet the clothes to be washed......conclusion=soap is not effectiive in hard water or in acidic water
sodium stearate soap:
