CHEMISTRY

CHEMISTRY

domingo, 5 de septiembre de 2010

Alka Seltzer

Have you ever being in a big party? Or at least in a family reunion where they serve tons and ton of food? ...and obiously since it is all extremley delicious you can't stop eating. What happens next? Yeah... stomach ache and, if you had being drinking, a really bad head ache. But that isn't a big problem, the only thing you have to do is take an Alka-Seltzer and you'll feel like new! Why? What does the Alka Seltzer has that makes you feel like ready to party again?
Well here I'll leave you a really simple explanation of how the Chemistry of the Alka Seltzer works.


Alka Seltzer tablets contain solid sodium bicarbonate and citric acid. When dropped into water, sodium citrate, carbon dioxide, and water are formed.




The Carbon dioxide escapes in the form of bubbles, thats why it fizz. Leaving only water and and sodium citrate.


The sodium citrate is a weak base. It neutralizes stomach acid (mainly HCl).

Na3C3H5O7 (aq) + 3 HCl(aq) H3C3H5O7 (aq) + 3 NaCl(aq)

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