Difference between revisions of "Chemistry of common things"

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m (Demineralized and distilled water)
m (Demineralized and distilled water)
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Yes, if you drink only water - any water - and eat absolutely nothing for two weeks you'll probably be dead.
 
Yes, if you drink only water - any water - and eat absolutely nothing for two weeks you'll probably be dead.
 
Maybe statistically ''slightly'' sooner for distilled and slightly later for tap. Not your main problem at this time...
 
Maybe statistically ''slightly'' sooner for distilled and slightly later for tap. Not your main problem at this time...
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==Hard water==
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Hard water refers to water that has relatively high mineral content.
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Typically specifically calcium, because this often means the water comes from a source where it has passed limestone, chalk or such, which give you things like calcium and magnesium carbonates, bicarbonates, and sulfates.
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Hard water is perfectly healthy (arguably slightly preferable for drinking water),
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but is less ideal for industrial processes,
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means you need more detergents (or a detergent that contains a water softener),
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and deposits limescale in kettles, showers, glasses, and such.
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But it also seems to protect metal pipes
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https://en.wikipedia.org/wiki/Hard_water#Effects
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Revision as of 17:05, 13 July 2019


Cooking

Doughs

Greenery

Trees, O2, CO2

Demineralized and distilled water

The difference

  • Distilled is nearly-pure H2O, because distillation leaves behind most other things.
  • demineralized means few to no minerals (fresh natural water has some, tapwater has a more-controlled bunch) but says little about what else may still be in there.
it's very useful to keep minerals out of chothes irons, car batteries, and such.


Contaminants in demineralized water

Demineralized water often mention it's not fit for consumption

largely because depending on the process of demineralization, there may be other things still left in there, say, a few bacteria. Your iron or battery won't care, but you might
also in part because it's also sold in supermarkets


In practice it's usually pretty clean water, but it's not guaranteed to be void of various things.


On nutritional deficiency:

In theory there are additives in tap water, mostly a few minerals/salts, some which we need, some less so. Most common are calcium, sodium and magnesium. The fluorine thing for teeth turned out to have some negative other effects so is generally being phased out.


These minerals won't be in distilled water or in demineralized water. If you drink only this instead of tap water, you may need to pay a little more attention to what you eat.

Note that water is not enough for a daily recommended dose of anything, but it certainly helps when you don't have a regular food intake for some of these.


Water poisoning

tl;dr: You are at negligible increased risk.

Water poisoning happens when drinking a large amount of any water in a short time. This would create effects like osmosis taking necessary salts out of your kidney. However, it is the salt in our food is what helps keep the salt balance, not the trace amounts of salts in tap water.

So if you eat anything salty you're good, and you'll probably crave it.

Yes, if you drink only water - any water - and eat absolutely nothing for two weeks you'll probably be dead. Maybe statistically slightly sooner for distilled and slightly later for tap. Not your main problem at this time...

Hard water