Battery Water Electrolysis

• How do the electrons flow through a voltaic cell (i.e., a battery)?
• Why is a salt bridge necessary?  What types of salt solutions are most useful within salt bridges? (What's the most important characteristic of these solutions?)
• What is the difference between an anode and a cathode?
• Where does the oxidation and reduction occur in a battery? 
  How is the redox half-cell related to both the flow of electrons and the cathode and anode?

http://ts2.mm.bing.net/th?id=HN.608000875050765589&pid=15.1&P=0

In spontaneous oxidation-reduction reactions, electrons are transferred and energy is released. If electrons flow through n external device energy is produced. Electrons only spontaneously flow from higher to lower potential energy. The salt bridge is a U-Shaped bridge to keep the balances charged. The cations move towards the cathode and the anions to the anode. An anode produces oxidation, while the cathode produces reduction. The redox half cell related to both the flow of electrons and the cathode and anode. The strongest oxidizer has the most positive reduction potentials and the strongest reducers have the most negative oxidizers. The greater the oxidation difference the greater the U.

For more information about Voltanic cells visit:

http://chemwiki.ucdavis.edu/Analytical_Chemistry/Electrochemistry/Voltaic_Cells

3 Q's

Recently I have learned the voltaic cell in my AP Chemistry class. I learned about being spontaneous and non spontaneous cells and how they react and function.I learned about the battery and how non-spontaneous reactions need a source of energy to balance their electrons. I just completed a lab on bones and finding out which ones which by clues. And also a lab on the electrolysis of water. which we concluded to be non spontaneous and it required a battery to produce the gases. I hope to do good on my retakes for chemistry.

3 Q's

Recently we completed a lab on calculating the percentage of H2O2 in a drugstore bottle of Hydrogen Peroxide. I actually completed the opposite experiment. Instead of titrating the KMno4 into the H202,  I titrated the H2O2 into the KMnO4.  I've learned about acid base equations, and titrating equations. Im planning on stepping up my game and dong everything in order to raise my grade in this class.

Determination of an Activity

 

The objectives of this explorer labwas to derive activity series, describe oxidation and reduction reactions by writing net ionic equations. Metals will loose electrons as easily as others will, thus explaining while they aren't all active. A replacement reaction is the replacement of  elements in compounds. A redox reaction involves the transfer  of electrons between two compounds. Metals have different reacttivity. They are ranked  by the highest reactions to the lowest;

3 Q's Blog

Recently we preformed a titration lab and have been working on acid-base equations. I have learned a lot about acid-base equations, and most recently about Redox equations.  I am really understanding the redox and oxidation equations. I plan to get a better grade in this class and i will put  in so much effort to make that happen.