Why is it that when I leave a glass of tap water out, it goes bad?

Subject: Why is it that when I leave a glass of tap water out, it goes bad?

Date: Sat Nov 29 13:56:42 2003
Posted by Rob
Grade level: 10-12 School: No school entered.
City: No city entered. State/Province: No state entered. Country: No country entered.
Area of science: Chemistry
ID: 1070135802.Ch

Message:


It seems like a glass of tap water would start to taste better after it has 
been left out (I've heard that that's how you distill the ions out of water).  
But it always tastes bad after it's been left out for more that a day or two.  
I can't figure out why this is.

Re: Why is it that when I leave a glass of tap water out, it goes bad?

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