how do u measure carbondioxide?please....?

Question

in my science class, my teacher gave this really confusing HW and measuring carbondioxide is one of them(how to measure human's carbondioxide when she is breathing out). please~~~ help me. and also please tell me the good website to look. thank you sooo much.

Answer 1

I think the information on the site (pdf file) below will answer your question.
http://www.epluse.com/fileadmin/datenblatt/sonstige/CO2_Measurement_Theory.pdf

Just click the necessary icon on the page
http://www.epluse.com/index.php?id=2&L=1&gclid=CJqkn6TG5Y8CFQ0bTAodbiWzag

Answer 2

I don´t know what grade you are in but a simple way to atleast show that there is CO2 in the air we exhale is to use a filtered lime solution. Or any alkaline hydroxide. Prepare a solution of calciumhydroxide (for instance) and make sure it is pure. It cannot be milky. Filter it if you have to. Now have someone exhale through a hose going into the flask with the solution. CO2 in the air will immediatelly turn into insoluable calciumcarbonate which can be observed as a milky substance in the flask. The reaction goes like this:
CO2 + H2O -> H2CO3
Ca(OH)2 + H2CO3 -> CaCO3 + H2O