March 28, 2024, 12:27:35 PM
Forum Rules: Read This Before Posting


Topic: electrochemical  (Read 1795 times)

0 Members and 1 Guest are viewing this topic.

Offline Saionji

  • Regular Member
  • ***
  • Posts: 43
  • Mole Snacks: +0/-1
electrochemical
« on: May 29, 2010, 11:24:45 AM »
Make a diagram of an electrolytic tank containing a solution of sodium chloride decimolar.
Connected to a generator, is a graphite electrode in the negative pole, and an iron electrode in pole
positive. From your diagram:
a) Write the equations of semi-reactions, and the overall reaction.
b) Say what happens to the pH.
c) Describe the color next to the electrodes when playing phenolphthalein.
Is : Fe -> (Fe²+) + 2e and (C²+) + 2e -> C. The Cl- will be on the iron electrode thus PH<7 e the graphite electrode PH>7 ?

Sponsored Links