B-Block+Batteries

Batterie Redox reaction: Pb + HSO4- --> PbSO4 + H+ + 2 e- Pb(lead):which is chemical element in the carbon group and it is a malleable metal which is regarded as a heavy metal and poor metal. Have you ever wonder how batteries work? they work by a special chemical reaction called a Redox reaction.

Redox reactions are part of the family of bonds that transfer electrons between atoms. they work by oxidation reduction which happen simultaniously. one side generates electrons at one electrode, and the other electrode on the opposite side uses them up. if there is a circuit that can connect both sides it causes the electrons to be transferred. thus causing there to be energy released. REDuction is the gaining of electrons and OXidation is the loss of electrons. when the electrons are transfered it changes the charges and oxidation state

Redox reactions occur naturally:
 * Biochemical energy reactions, such as photosynthesis, chemosynthesis, respiration, phosphorilation, etc., depend on redox chemistry. They are EXTREMELY vital to our survival. **

Batteries are used everyday to help us humans live more plesantly. if we never understood REDOX reactions we would never have cars, T.V., buildings with power etc... And thats just things that make life easier for us, we depend on REDOX reactions to occur so we can breathe, and for plants to produce oxygen for us. REDOX reactions MUST occur in order for life to proceed.



[|Example of Redox reactions]

**//The reaction between chlorine and iron(2) ions//** Chlorine gas oxidises iron(2) ions to iron(3) ions. during this process, the chlorine is reduced to chloride ions. You start by writing down what you know for each of the half-reactions. In the chlorine case, you know that chlorine (as molecules) turns into chloride ions:  The first thing to do is to balance the atoms that you have got as far as you possibly can:  Next add things to the half-equation in order to make it balance completely. you can add water, electrons and hydrogen ions

So far we produced charges that arnot balanced. The left side of the equation has no charge, but the right side carries 2 negative charges. to balance the equation add two electrons to the left side. The final balance equation is:  Now you repeat this for the iron(2) ions. They are oxidised to iron(3) ions:  Now we have to reduce the positive charges on the right side, this is easily fixed by adding an electron on the right side. <span style="background-color: #ffffcc; font-family: Helvetica,Arial; font-size: medium;">The iron reaction will have to happen twice for every chlorine molecule that reacts. once they're done reacting, add the two half-equations together.

...............aaaaaand thats REDOX GANGSTERNESS! >;D [] []