Science Buddies: "Ask an Expert"

HI,
i am doing almost the exact same project and i do need help measureing CO2 so any ideas?

Hi, i replied to this project before, and i was wondering if you used th KOH method? or did you use something else?

Hi K-Rock,

For carbon dioxide measurement , you can use a commercially available carbon dioxide probe or use a wet chemistry titration method. I agree with vtrip that using a titration method would be excellent in a science fair project because it will help demonstrate that you understand the chemistry of your project.

Here is a very interesting method for measuring carbon dioxide from a 1923 paper. The chemistry has not changed, so this method should still work well.

http://www.jbc.org/content/55/4/751.full.pdf

Here are some references using bromthymol blue titration to measure dissolved carbon dioxide:

http://boyles.sdsmt.edu/respira/Carbon% ... 265,10,Fun Facts

http://en.wikipedia.org/wiki/Bromothymol_blue

http://www.scienceteacherprogram.org/bi ... rez03.html

What are you doing for your project? Do you need more information?

Donna Hardy