Hi everyone. I am just wondering, is there sodium chloride in soap? You know, in just like those regular hand soaps in bathrooms. Its for a science project, because I want to corrode iron nails and I think sodium chloride does that. Thanks!
2006-10-24 11:17:22 · 3 answers · asked by Mallory B 3 in Science & Mathematics ➔ Other - Science
Sodium chloride, or salt, corrodes metals very well. Check out cars that are driven in states that use salt on their roads in the winter to remove ice. Within a few years the bottom of the body is badly rusted unless an undercoating has been applied and maintained. Corrosion from salt spray in coastal areas is also well known.
Dry salt, used as an abrasive, can help scour metals. But the metal would have to be well rinsed to remove any remaining salt afterward.
There is no reason for soap to have salt in it, though some brands may for whatever reason. The link below takes you to a home-made soap recipe which contains water, lard, and lye. The various manufacutrers probably consider their formulas as a trade secret and would not disclose them under any circumstances. They may contain fragrances, conditioners, emulsifiers, etc.
2006-10-24 15:47:48 · answer #1 · answered by Anonymous · 0⤊ 0⤋
I don't think it's sodium chloride. Table salt is sodium chloride and its used to clean rust off of rusty nails.
2006-10-24 13:17:22 · answer #2 · answered by sandysstyles 2 · 0⤊ 0⤋
You must have NaOH for the saponification of the fat molecules. (Saponification is a synonym for the base catalyzed hydrolysis of the ester groups.) The product fatty acid neutralizes the hydroxide ion so, overall, OH- becomes a reagent as well as a catalyst. NaCl is employed in the subsequent steps and is hence listed as an ingredient.
2016-05-22 10:40:22 · answer #3 · answered by Anonymous · 0⤊ 0⤋