Ionised and distilled water
10-01-2004, 10:39 AM
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Ionised and distilled water
Want to buy some distilled water to flsuh the cooling system but could only find bottles of ionised water - is it the same thing? Stupid question probably 
10-01-2004, 11:07 AM
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10-01-2004, 11:54 AM
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I knew my 15 years in the chemical industry would eventually come in handy.
Technically, distilled water simply is what is says on the tin, ie. heated and then distilled to remove salts and other impurities. However, as it's the salts that increase conductivuty in the first place, distilled water is often used for its reduced conductivity. However, volatile impurities like alcohols will not be removed as these will simply condense back with the water.
Deionised water, on the other hand, has been passed through an ion exchange resin whilst its conductivity is measured. The more "treatment" it is given, and the better the ion exchange, the lower the conductivity. The battery industry obviously needs to use water in its cells that is of a known conductivity. Deionised water can sometimes be referred to as demineralised water, as the process also involves an ion exchange.
Any water sold should have a specification stating its conductivity (measured in "mu" ... sorry, can't produce the greek symbol).
Even I'm bored now ...
Why do you want to know this stuff anyway?
Shiskine
Technically, distilled water simply is what is says on the tin, ie. heated and then distilled to remove salts and other impurities. However, as it's the salts that increase conductivuty in the first place, distilled water is often used for its reduced conductivity. However, volatile impurities like alcohols will not be removed as these will simply condense back with the water.
Deionised water, on the other hand, has been passed through an ion exchange resin whilst its conductivity is measured. The more "treatment" it is given, and the better the ion exchange, the lower the conductivity. The battery industry obviously needs to use water in its cells that is of a known conductivity. Deionised water can sometimes be referred to as demineralised water, as the process also involves an ion exchange.
Any water sold should have a specification stating its conductivity (measured in "mu" ... sorry, can't produce the greek symbol).
Even I'm bored now ...
Why do you want to know this stuff anyway?Shiskine
10-01-2004, 02:02 PM
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Damn it...how stupid am I? yup I should have written de-ionised. I;ll be flushing the coolant out of the car this weekend so that I can refresh the system. I bought some Honda Type 2 coolant (
yup I should have written de-ionised. I;ll be flushing the coolant out of the car this weekend so that I can refresh the system. I bought some Honda Type 2 coolant (
10-01-2004, 02:28 PM
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WHY?
Normal water is pretty clean, I do a lot of film processing and spent some time finding water that dosent leave any drying marks (limescale), purified water is good (but
Normal water is pretty clean, I do a lot of film processing and spent some time finding water that dosent leave any drying marks (limescale), purified water is good (but
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