Homework Help: Chemistry

Posted by Audra on Sunday, November 1, 2009 at 9:27pm.

I am trying to show that the combined weight of the reactants is equal to the combined weight of the reaction. When I placed CaCl2 into Na2 CO3 I didn't lose any weight. When I added Sulfuric Acid, I could not recork due to safety, therefore I lost Carbon Dioxide which reduced my weight. How can I safely contain the Carbon Dioxide to maintain the weight?

Chemistry - bobpursley, Sunday, November 1, 2009 at 9:29pm
Why not balloon the flask instead of cork it?
Chemistry - Audra, Sunday, November 1, 2009 at 9:31pm
Thank you!
Chemistry - DrBob222, Sunday, November 1, 2009 at 9:32pm
I've never encountered this problem; however, here is a quick way although it may sound round about.
Tape to the inside of the container above the water line a small container of ascarite. That will absorb the CO2. There may be simpler ways but they don't come to mind quickly.

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