3 Qs

Recently I've learned about thermodynamics and how to solve for the entropy and ethalpy. Also about Gibbs law. In anatomy I just finished a claymation on muscle contraction. I plan to study thermodynamics over the break so I don't forget anything when I come back next semester.

Three Questions

Recently Iv'e learned about Hess's Law. We did a lab today that measure the enthalpys of different reactions; HCl and NaOH, NaOh and NH4Cl, and HCl and NH3. We measured the temperature change of two reactions and used Hess's law to determine the  the enthalpy change, delta H of a third reaction. I am understanding the calculations on how to figure out enthalpy and Hess's law. I hope to keep up my studies in this class and get at least a C in this class.

three questions

This week I learned about the sodium potassium pump. I learned how it is used as a electrochemical gradient in the body. As action potential moves throughout the cell acting as a domino effect, it occurs towards the direction of polarization. It occurs before the muscles can be stimulated again and the ionic concentration of the resting potential is restored by the sodium potassium pump. As the sodium enters the cell it has a reversal effect in charge and leads a change in the permeability momentarily. I have been taking my studies in chemistry to the next level. I come in during lunches and work on notes or worksheets. I ask more questions now in class and I read the book and study for about two hours a night at home. I hope to continue this work and make a drastic improvement in my grade. 

3 Questions

Recently I've learned about gas laws in chemistry class. I learned more about Boyle's law, Charles law, and avogardo's law. I also learned about Dalton's law of partial pressure. In anatomy I am learning about the skeletal system. And I am hoping to finally get strapped down and focus on getting better grades in my Ap chem class.

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.