Showing posts with label chemistry 121b. Show all posts
Showing posts with label chemistry 121b. Show all posts

Monday, December 8, 2008

O_o

Particles of zinc are mixed with an electrolyte (usually potassium hydroxide solution); water and oxygen from the air react at the cathode and form hydroxyls which migrate into the zinc paste and form zincate (Zn(OH)42-), at which point electrons are released and travel to the cathode. The zincate decays into zinc oxide and water is released back into the system. The water and hydroxyls from the anode are recycled at the cathode, so the water serves only as a catalyst. The reactions produce a maximum voltage level of 1.65 volts, but this is reduced to 1.4–1.35 V by reducing air flow into the cell; this is usually done for hearing aid batteries to reduce the rate of water drying out. (Wikipedia)

Whats scary?  That paragraph makes sense.  I did learn something this semester!!



Bwahahaha

So, not counting 'attendance points' (wtf?), if I don't show up to the final (which I would, obviously, but you know) I would still get a solid C.  Without even taking the final.  Bwahahaha!!  Now if only freaking physics could have worked out more that way...

Friday, November 7, 2008

DP 1107


Chem Test Study Session
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Wednesday, October 8, 2008

100808


Chem Homework 7 - Acid Base Reactions.
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