to help neutralize salt.... - Honda Civic Forum



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Old 01-15-2003   #1
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to help neutralize salt....

i heard on a radio talk show- that if you put a little baking soda in your bucket o soap when u wash ur car, it will help neutralize the body eating salt that accumulates on your body durring the winter
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Old 01-15-2003   #2
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ok...are you asking or have you tried this??
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Old 01-16-2003   #3
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i really don't see how that would work. the most commonly used road salt is sodium cloridie (NaCl). since NaCl is a solid precipitate of HCl(aq) and NaOH(aq), the dissociation of HCl is pretty much equal to to the dissociation of NaOH. Therefore [H+][A-]/[HA] will approach a pKa value of pretty damn near seven. In short, a salt solution of sodium chloride is neutral with pH of 7--not acidic nor basic. i don't think that adding baking soda (base) will help any better than just flushing with fresh water.

sometimes calcium chloride is used in lieu of sodium chloride. in that case, the salt is comprised of a higher charged metal (Ca+2 as opposed to Na+1). Because of the slightly higher charge it will decrease the dissociation of A-. this means that calcium chloride is barely acidic--almost negligible.

water is an amphoteric compound meaning that it can act as either (very) weak acid or (very) weak base--enough water will bring an acid or a base close to neutrality.

save your baking soda for cleaning battery terminals. flushing already neutral road salt with baking soda is unnecessary--just flush with lots of water.
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Old 01-16-2003   #4
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[hr]Originally posted by: jro
i really don't see how that would work. the most commonly used road salt is sodium cloridie (NaCl). since NaCl is a solid precipitate of HCl(aq) and NaOH(aq), the dissociation of HCl is pretty much equal to to the dissociation of NaOH. Therefore [H+][A-]/[HA] will approach a pKa value of pretty damn near seven. In short, a salt solution of sodium chloride is neutral with pH of 7--not acidic nor basic. i don't think that adding baking soda (base) will help any better than just flushing with fresh water.

sometimes calcium chloride is used in lieu of sodium chloride. in that case, the salt is comprised of a higher charged metal (Ca+2 as opposed to Na+1). Because of the slightly higher charge it will decrease the dissociation of A-. this means that calcium chloride is barely acidic--almost negligible.

water is an amphoteric compound meaning that it can act as either (very) weak acid or (very) weak base--enough water will bring an acid or a base close to neutrality.

save your baking soda for cleaning battery terminals. flushing already neutral road salt with baking soda is unnecessary--just flush with lots of water.
-jro[hr]

Damn, are you a chemical engineer???

[IMG]i/expressions/laugh2.gif[/IMG]


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Old 01-16-2003   #5
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[hr]Damn, are you a chemical engineer???

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ha. not yet. i still have about three more years (at least).
-jro

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