2006-09-19 00:54:30 · 5 answers · asked by glenn2101 1 in Science & Mathematics ➔ Other - Science
The surface of a new bar of soap is "as manufactured" while a used bar of soap has a surface layer of soap that has been dissolved in water (hard water?) and dried. There could be a difference. If you add water to a bowl of cereal then dry it out there is a difference. You may have to wash away the "used" layer of soap to get to fresh soap. It would be interesting to experiment with two bars of soap and two samples of water; faucet water and distilled water may affect the soap differently unless dissolved soap (and any additives?) changes chemically.
2006-09-19 01:45:57 · answer #1 · answered by Kes 7 · 0⤊ 0⤋
every time you wash your hands there is less surface area on the bar to lather with.
2006-09-22 23:23:56 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Use the liquid bath soap so you don't have to spend your time worrying about silly things like that.
2006-09-19 08:39:33 · answer #3 · answered by Candi S 3 · 0⤊ 0⤋
maybe the 1st layer has a slightly different chemical makeup than the inside ones.. just a guess
2006-09-19 07:57:24 · answer #4 · answered by simply stunning 1 · 1⤊ 0⤋
air changes the molecules and drys them up
2006-09-19 08:03:18 · answer #5 · answered by grmilet 2 · 0⤊ 0⤋