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Author Topic: Salt Water Indicator  (Read 3184 times)

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KraigH

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Salt Water Indicator
« on: December 01, 2005, 05:16:19 AM »

I am looking for the solution that will detect the presence of salt water.  I have seen a dropper of soluition placed on a surface exposed to salt water and it turned red/pink when sodium chloride was present.

I initially thought the solution was Silver Nitrate but this creates a white precipitate when introducted to Chloride.

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jdurg

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Re:Salt Water Indicator
« Reply #1 on: December 01, 2005, 06:55:42 AM »

A rhodium salt would do that as rhodium chloride is an intensely red color.  (Which is how rhodium got its name).  However, at about $3,000 per OUNCE of Rhodium, it would be a needlessly expensive test when something as simply as a silver nitrate solution would be just as effective.
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KraigH

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Re:Salt Water Indicator
« Reply #2 on: December 01, 2005, 06:03:38 PM »

any idea what the solution was that I saw used?
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jdurg

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Re:Salt Water Indicator
« Reply #3 on: December 05, 2005, 09:50:24 AM »

It could very well have been an aqueous solution of a rhodium salt.  Something like rhodium nitrate or whatnot.
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