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Pure Water Myth

Old 05-06-2007, 11:10 AM
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Takedown
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Default Pure Water Myth

Is it true that if there was such thing as pure water with no mineral or anything in it that it would not conduct electricity?
Ive heard this saying before but am a little sketchy about it. It would actually be sweet if there was no such thing as unpure water. We'd be heathier and live longer and be able to sink my e-maxx to the bottom of a lake and still be able to run.
Is this true?
Old 05-06-2007, 11:11 AM
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Default RE: Pure Water Myth

Just found this to support the myth

Electricity is the flow of charges. Many minerals and gases will readily
dissolve in water. It is the presence of this minerals and gases that allow
water to conduct electricity. Perfectly pure water without these impurities
will not conduct electricity. This is why salt water is a good conductor of
electricity.


Old 05-06-2007, 11:15 AM
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RS4rallydriver
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Default RE: Pure Water Myth

sounds like it makes sense. email the mythbusters about it!
Old 05-06-2007, 11:16 AM
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Default RE: Pure Water Myth


ORIGINAL: RS4rallydriver

sounds like it makes sense. email the mythbusters about it!
That's be a pretty boring episode if they made one
Old 05-06-2007, 11:17 AM
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Default RE: Pure Water Myth

Why is this posted in an RC car forum? Take this post to the off topic forum.
Old 05-06-2007, 11:20 AM
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Takedown
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Default RE: Pure Water Myth

Its not off topic I commented about it with electronics being put under water.
Old 05-06-2007, 11:27 AM
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mstnr
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Default RE: Pure Water Myth

pure, or demineralized water is not a myth. it is used for example in steam based power plants (including nuclear). however, demi water is strongest acid, while not fast, it is able to absorb almost any mineral and metal, slowly, but surely. it doesnt lead electricity.
Old 05-06-2007, 11:35 AM
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Default RE: Pure Water Myth

Yes It's called Deionized water. 100% of everything is removed from the water, and it is used in various places. check here for more info: http://en.wikipedia.org/wiki/Deionized_water

however, It does NOT occur naturally, and being as such, If you were to drink it, it would actually absorb minerals from your body... which wouldn't be good.

and no, deionized water doesn't conduct electricity. so if you were swimming in a lake of deionized water (if such a thing existed) and the lake was struck by lightning, you would be fine. however NEVER swim in a lake during a thunderstorm.. cuz if that does happen... you're toast.
Old 05-06-2007, 11:44 AM
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Default RE: Pure Water Myth

That is really cool how thats real. I wish i knew this earlier.
Old 05-06-2007, 01:39 PM
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Default RE: Pure Water Myth

actually i have demi water in a 5l bottle stored here, i use it sometimes to cleaning and in water cooling of PC
Old 05-06-2007, 02:27 PM
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Default RE: Pure Water Myth

You actually use the ability of water to conduct electricity to determine how pure the water is. The lower the milli Siemen/cm reading, the more pure the water.

You can get extremely pure water through a number of processes. De-ionisation or Reverse Osmosis are about the most well known. Sometimes they are used in tandem. Dual pass Reverse Osmosis machines and then an CDI (Continous De-Ioniser). To give you an idea of how efective these systems are.

Normal tap water is somewhere in the range of 220 mS/cm. or if you prefer 0,22 S/cm. Dual pass RO's with a CDI can easily get that down to 0,1 uS/cm. Or if you prefer 0,0000001 S/cm.

That is pure enough to be used as WFI (Water For Injection). It is what they make Intravenious Solutions from. By running the reject rate on the RO's and CDI's higher you can get them to produce a lot purer water. But you would get out less than 1% of the total water you put in.

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