How would you answer this question? (1 Viewer)

[pencilcase]

HOW WOULD YOU ANSWER THIS QUESTION?
Please give me a bullet-proof answer for rubber.k thx.
the question is:

"name a natural product (i chose rubber),other than a fossil fuel, that you have researched. Discuss the issues caused by its decreasing availabilty, identifying replacement materials and/or current research taking place to produce alternatives using industrial processes."

thanks,best answer i will rep them

CHEM EXAM IS IN ONE MONTH FROM TODAY...BE SCARED...BE VERY SCARED..MY TUTE SAID THIS WILL BE THE HARDEST EXAM OF ALL THE YEARS...MUWAHAHAHHAHA!

 

[esraa]

Natural rubber..
Before the 1940s, most rubber was sourced from tropical areas such as Malaya and Burma. Rubber plantations were 'tapped', an incision was made and latex sap was collected, and refined into natural rubber. However, during WWII, the demand for rubber increased greatly (used for military vehicles- wheels etc.) and these natural rubber supplies could no longer meet the high demand. Even today, rubber is so widely and tropical plantations can no longer meet demand bla bla
Synthetic rubber..
During WWII, American and German scientists produced synthetic rubber, most commonly SBR (styrene butadeine). This still makes up 80% of rubber produced today.

This is what i remember from my notes

 

[jamesfirst]

- Natural rubber = polyisoprene

It was mainly used in WW2 as vehicles and shizzz but, although it is a renewable source, cannot keep up with the increasing demand and hence new product must be introduced

- SBR (styrene-butadiene rubber) is the replacement synthetic rubber

It is:

- more superior than natural rubber
- can be vulcanised to increase its elasticity
- etc etc etc etccccccccccccccccccccccccccccccccccccccccccccccccc

 

[pencilcase]

how about this question;

http://imageshack.us/photo/my-images/231/cssaquestion.png/

 

[esraa]

how about this question;

http://imageshack.us/photo/my-images/231/cssaquestion.png/

i- k= [CO]x[H2O]
[CO2][H2]

ii- i got k= 5.55 (2 dp)