Nano-Laboratory
Science brain teasers require understanding of the physical or biological world and the laws that govern it.
Time has passed, and new technologies have been developed. The job of our nano-laboratory is developing new products of "nano" accuracy. For example, if we develop telescopes, we do not allow an error of even a nanometer in the lenses, because this will result in great error when put to use.
The first project of our laboratory is producing nano-purified water, i.e. no ion is allowed to have a concentration of more than 1 nanomole per liter.
No matter how hard we tried, we failed. Why?
Answer
Water is a weak electrolyte. In water at room temperature, the concentration of hydrogen ion and hydroxide ion each equal 10^(-7) mole per liter, which is 100 times 1 nanomole per liter.
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Comments
kwelchans   
Dec 13, 2007
| This teaser requires too much science knowledge. Not a trick. |
zeepuzzlemaster 
Dec 13, 2007
| I agree. Isn't this science?  |
javlad27
Dec 13, 2007
| yeah |
CatsAreCute
Dec 29, 2007
| Great one!  Interesting, too! Somehow I managed to guess something like what the answer said...  |
Hufflepuffle
Jan 15, 2008
| It's a science teaser--it just requires basic gen. chem. knowledge. Very nice puzzle. |
Holo 
Jan 20, 2008
| This teaser requires too much science knowledge. Not a trick. |
rockstar1234567
Jan 26, 2008
| fun. thats all i got to say |
friesaregood
Apr 11, 2008
| At the risk of sounding like an idiot, I put forth the question. What's a nanomole? |
castillion
May 02, 2008
| Way too hard for me! Geeky!  |
Wa11E 
Sep 20, 2008
| I had no chance - F for that one |
princess2007
Mar 09, 2011
| I found that easy! Yay! Ionic constant of water rite!?? =D i feel smart. |
Candi7
Jun 12, 2012
| AND HOW WAS I SUPPOSED TO KNOW THAT!?!?
Never mind. I know EXACTLY how I was supposed to know that. I should have payed attention in class! |
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