zeinab7691 said:
I have an assesment due very sooonn,, and i no this is the 100th timee this topic has been postedd but the sites arent openin with me. Heres the full question
Present information on the structure and chemistry of a lead- acid cell batery and evaluate it in comparison to a button (silver) cell in terms of:
* Chemistry
*cost and practicality
*impact on society
* Environmental impact
Im so lost i dunnno wat i have to doo.. cathode anode?? PLEASE HELPP !! can sum onee also brake down the question for meee pleaseeee
Look ummm... Ma'm! This is an easy google/wiki question. I had to quickly learn this for the HSC and cram the info in. I can't remember the fine points (equations) but that is easily looked up on the net. I'll lay it out for you as best i can. (PS this question looks like it came straight from the syllubus.) BTW REMEMBER-->
ANODE=POSITIVE (+) CATHODE= NEGATIVE (-)
attracts ANIONS (-) attracts CATIONS (+)
Lead-acid battery (CAR BATTERY) consists of a strong sulfuric acid electrolyte with different (variable valence) lead products. One is normal lead (anode) and the other is lead oxide (cathode).
The button cell is a dry cell, that means that it does not contain a liquid electrolyte (usually a paste). Silver oxide is used as the cathode and the commonly used anode is zinc. The electrolyte is an alkline paste, either sudium or postassium hydroxide!
BREAKING IT DOWN!!!!.... not really.....
Chemistry- Build on what i have reguratated here and PLEASE FOR THE LOVE OF JESUS ALLAH BUDDA put the half cell equations for the anode and cathode and then the full equation for the cell then explain this. Remember to also maybe write a short paragraph to explain why and how the battery gives of electricity. (A redox reaction - Reduction-(gain of electrons) and Oxidation-(loss off electrons) and how the electrolyte plays it's part by allowing the ions (electrons= e-) to move though it.)
The reast can be bullshit(ed) but it is boring... good luck lol...
Cost and practicality- Bascially is it ecomonically viable (RESEARCH) and is it practical for the situation. EG. Button (Ag) Cell is practical for watches ect as it is small but does it give the right amount of voltage and amps with respect to the object. Also life spand. Usually not rechargable.
EG. Lead-Acid cell is heavy and bulky but the voltage and amplitude is perfect for the job it does. Rechargable.
RESEARCH!
Impact on society- More or less, has or can society benefit from the cell and in contrast does it create unwanted problems for society. (You can make up your own mind but believe me, theres a right and wrong answer).
Environmental impact- Most batteries, when discarded become waste-
Silver button is recycled to gather the rare and expensive metals (Ag!)
Lead Acid cell has no desirable components so is discarded, and heres the hot tip, strong sulfuric acid isn't usually good for the environment. ELABORATE!!!
You got lucky that i remembered alot more when i started typing
.
You need to elaborate extensively and draw your own conclusions based on research which shouldn't be to hard. Use this as a guide and a mind jogger if it helps at all. Wish you luck, are u leaving it a bit late???
. If ur it sounds like ur stressing, don't lol, it'll give u wrikles and not girl wants that! (Disclaimer-Not proven-Use to scare girls that worry to much.. SHIT!)
Cheers!
